BioInfo (UK)

Crataegus L. (hawthorns)

BioImages BioImages (www.bioimages.org.uk) has 67 images of Crataegus (hawthorns)

NBN NBN (data.nbn.org.uk) has the UK distribution map of Crataegus (hawthorns)

Subtaxa (ie subgroups of this Genus)

Taxon Rank #webs

Suggested Literature

Identification Works

Alien species

Wurzell, B., 1992 Foreign Crataegus in Britain: a thorny problem.

Native species

anon., 2012 Crataegus

Crataegus may also be covered by literature listed under:

BIOTA
(living things)
Eukaryota
(eukaryotes)
PLANTAE
(plants)
TRACHEOPHYTA
(vascular plants)
MAGNOLIOPSIDA
(flowering plants)
Broadleaved trees Trees Broadleaved trees and shrubs Trees and shrubs Trees, shrubs, woody and climbing plants (via Broadleaved trees)

Feeding and other inter-species relationships

Associated with Crataegus:

(dead) dead is decayed by colony of Acrodontium dematiaceous anamorph Acrodontium hydnicola - a dematiaceous anamorphic fungus UK/Ireland Dennis, R.W.G., 1995
(dead) dead is decayed by Cylindrodendrum anamorph Cylindrodendrum album - an anamorphic fungus (Hypocreales: Nectriaceae) UK/Ireland Dennis, R.W.G., 1995
(dead) dead is associate of imago Acalles misellus - a weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002
(fungus-infested) fungus-infested is associate of perithecium Nitschkia collapsa - a pyrenomycete (Coronophorales: Nitschkiaceae) Ellis, M.B. & J.P., 1997 [usually with Diatrype stigma growing on this host]
(pyrenomycete infection) pyrenomycete infection is associate of perithecium Nectria episphaeria - a pyrenomycete (Hypocreales: Nectriaceae) Ellis, M.B. & J.P., 1997
is foodplant of Polydrusus (Eustolus) pterygomalis - a weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Polydrusus (Neoeustolus) cervinus - a weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Phyllobius (Metaphyllobius) glaucus - a leaf weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Phyllobius (Nemoicus) oblongus - Brown Leaf Weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Phyllobius (Phyllobius) pyri - Common Leaf Weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Rhamphus oxyacanthae - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is foodplant of erumpent pycnidium of Phoma coelomycetous anamorph Phoma crataegi - a coelomycete (Pleosporales) UK/Ireland Dennis, R.W.G., 1995
has sap sucked by adult Psallus (Hylopsallus) perrisi - a plantbug (Hemiptera: Miridae) UK/Ireland Southwood, T.R.E. & Leston, D., 1959,
Nau, B.S., 1984
has sap sucked by adult Psallus (Hylopsallus) variabilis - a plantbug (Hemiptera: Miridae) Nau, B.S., 1984
has sap sucked by adult Psallus (Hylopsallus) wagneri - a plantbug (Hemiptera: Miridae) Southwood, T.R.E. & Leston, D., 1959,
Nau, B.S., 1984
has sap sucked by nymph Psallus (Hylopsallus) wagneri - a plantbug (Hemiptera: Miridae) Southwood, T.R.E. & Leston, D., 1959
has sap sucked by adult Psallus (Mesopsallus) ambiguus - a plantbug (Hemiptera: Miridae) UK/Ireland Southwood, T.R.E. & Leston, D., 1959,
Nau, B.S., 1984
has sap sucked by nymph Psallus (Mesopsallus) ambiguus - a plantbug (Hemiptera: Miridae) UK/Ireland Southwood, T.R.E. & Leston, D., 1959,
Nau, B.S., 1984
is decayed by superficial stroma Daldinia concentrica - King Alfred’S Cake, Cramp-ball (Xylariales: Xylariaceae) UK/Ireland Rare Whalley, A.J.S. & Watling, R., 1980
is associate of Hadrobregmus denticollis - a wood boring beetle (Coleoptera: Anobiidae) Bullock, J.A., 1992
is associate of Opilo mollis - a chequered beetle (Coleoptera: Cleridae) Bullock, J.A., 1992
is associate of Anthribus fasciatus - a fungus weevil (Coleoptera: Anthribidae) Bullock, J.A., 1992 [larvae feed on Coccids]
is associate of Anthribus nebulosus - a fungus weevil (Coleoptera: Anthribidae) Bullock, J.A., 1992
is associate of Anthonomus (Anthonomus) bituberculatus - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is associate of Anthonomus (Anthonomus) chevrolati - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is associate of Anthonomus (Anthonomus) pedicularius - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is associate of Magdalis (Porrothus) cerasi - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is associate of imago Anthaxia (Anthaxia) nitidula - a jewel beetle (Coleoptera: Buprestidae) Bullock, J.A., 1992
is associate of fruitbody Verpa conica - Thimble Morel (Pezizales: Morchellaceae) UK/Ireland Reid, D.A., 1977
is associate of fruitbody Agaricus lutosus - a mushroom (Agaricales: Agaricaceae) UK/Ireland Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
is associate of fruitbody Agaricus subfloccosus - a mushroom (Agaricales: Agaricaceae) UK/Ireland Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
is associate of fruitbody Coprinus poliomallus - an inkcap (Agaricales: Agaricaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
is associate of fruitbody Entoloma niphoides - a toadstool (Agaricales: Entolomataceae) Major Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
is associate of basidiome Cantharellus melanoxeros - Blackening Chanterelle (Cantharellales: Cantharellaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
is associate of fruitbody Geastrum coronatum - Crowned Earthstar (Geastrales: Geastraceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [on calcareous loam soil, woodland, dunes, hedgerows, graveyards]
is associate of fruitbody Geastrum fimbriatum - Sessile Earthstar (Geastrales: Geastraceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [on often calcareous loam soil in woodland]
is associate of fruitbody Geastrum pectinatum - Beaked Earthstar (Geastrales: Geastraceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [on soil in woodland, parkland, gardens, hedgerows, dunes and old spoil heaps]
is associate of fruitbody Geastrum quadrifidum - Rayed Earthstar (Geastrales: Geastraceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [on calcareous soil]
is associate of fruitbody Geastrum striatum - Striate Earthstar (Geastrales: Geastraceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [on soil]
may have adult Cryptocephalus pusillus - a leaf beetle (Coleoptera: Chrysomelidae) Cox, M.L., 2007
may have adult Cryptocephalus querceti - a leaf beetle (Coleoptera: Chrysomelidae) Cox, M.L., 2007
may have adult Cryptocephalus sexpunctatus - 6-spotted Pot Beetle (Coleoptera: Chrysomelidae) Cox, M.L., 2007
bark (dead, attached) dead, attached bark is decayed by fruitbody Hymenochaete cinnamomea - a resupinate fungus (Hymenochaetales: Hymenochaetaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
bark (dead, fallen) dead, fallen bark is decayed by fruitbody Hymenochaete cinnamomea - a resupinate fungus (Hymenochaetales: Hymenochaetaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
bark (dead) dead bark is decayed by effuse colony of Pseudospiropes dematiaceous anamorph Pseudospiropes subuliferus - a dematiaceous anamorphic fungus (Helotiales: Helotiaceae) UK/Ireland Dennis, R.W.G., 1995,
Ellis, M.B. & J.P., 1997
bark (wet) wet bark is decayed by apothecium Orbilia sarraziniana - a glasscup (Orbiliales: Orbiliaceae) Ellis, M.B. & J.P., 1997
berry (buried, mummified) buried, mummified berry is decayed by fruitbody Tubaria dispersa - Hawthorn Twiglet (Agaricales: Inocybaceae) Major Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
berry berry is foodplant of adult Turdus viscivorus - Mistle Thrush (Passeriformes: Muscicapidae) UK/Ireland Briggs, J., 1995
branch (cankered) cankered branch may be infected and damaged by Nectria galligena - Apple and Pear Canker (Hypocreales: Nectriaceae) Buczacki, S. & Harris, K., 1998
branch (dead, corticate) dead, corticate branch is decayed by sessile, densely clustered, erumpent apothecium Mollisia caespiticia - a discomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (dead, corticate) dead, corticate branch is decayed by erumpent stroma Hypoxylon multiforme - Birch Woodwart (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead, decorticate or with bark rolling back) dead, decorticate or with bark rolling back branch is decayed by widely effused stroma Diatrype stigma - Common Tarcrust (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
branch (dead, decorticate or with bark rolling back) dead, decorticate or with bark rolling back branch is decayed by stromatic, immersed perithecium Diatrype stigma - Common Tarcrust (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
branch (dead, decorticate) dead, decorticate branch is decayed by hysterothecium Hysterium angustatum - a coffee bean fungus (Hysteriales: Hysteriaceae) Ellis, M.B. & J.P., 1997
branch (dead, decorticate) dead, decorticate branch is decayed by effuse stroma Hypoxylon multiforme - Birch Woodwart (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead, esp. buried under brushwood) dead, esp. buried under brushwood branch is decayed by gregarious, subiculate perithecium Rosellinia aquila - a pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997 [especially near the bottom of piles of brushwood]
branch (dead, esp. buried under brushwood) dead, esp. buried under brushwood branch is decayed by colony of Geniculosporium dematiaceous anamorph Rosellinia aquila - a pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997 [especially near the bottom of piles of brushwood]
branch (dead, fallen, characteristically reddish-brown) dead, fallen, characteristically reddish-brown branch is decayed by immersed, stromatic, in group of usually 3 to 8 perithecium Lopadostoma turgidum - a valsoid pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead, fallen, characteristically reddish-brown) dead, fallen, characteristically reddish-brown branch is decayed by Cytospora coelomycetous anamorph Lopadostoma turgidum - a valsoid pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead, fallen, decayed) dead, fallen, decayed branch is decayed by fruitbody Skeletocutis nivea - Hazel Bracket (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
branch (dead, fallen) dead, fallen branch is decayed by extensively subiculate apothecium Tapesia fusca - a discomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (dead, fallen) dead, fallen branch is decayed by stalked apothecium Hymenoscyphus imberbis - a discomycete (Helotiales: Helotiaceae) Ellis, M.B. & J.P., 1997 [in wet places]
branch (dead) dead branch may contain larva Tetrops praeustus - Plum Longhorn Beetle, Plum Beetle (Coleoptera: Cerambycidae) Bullock, J.A., 1992
branch (dead) dead branch is decayed by immersed, in small groups, subiculate pseudothecium Otthia spiraeae - an ascomycete (Botryosphaeriales: Botryosphaeriaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Diplodia coelomycetous anamorph Otthia spiraeae - an ascomycete (Botryosphaeriales: Botryosphaeriaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by sessile apothecium Mollisia cinerea - Common Grey Disco (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by sessile apothecium Mollisia ligni - a discomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by solitary or in small group apothecium Patellariopsis atrovinosa - a discomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by erumpent, solitary or in small group apothecium Pezicula sepium - a discomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by effuse colony of Pseudospiropes dematiaceous anamorph Strossmayeria basitricha - a discomycete (Helotiales: Helotiaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by gregarious apothecium Hyaloscypha hyalina - a discomycete (Helotiales: Hyaloscyphaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by fasciculate apothecium Lachnum fasciculare - a discomycete (Helotiales: Hyaloscyphaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by clustered, erumpent through cracks in bark apothecium Plagiostoma alneum - a valsoid pyenomycete (Diaporthales: Gnomoniaceae) Yao, Y.-J. & Spooner, B.M., 1996
branch (dead) dead branch is decayed by superficial, gregarious perithecium Lasiosphaeria caudata - a pyrenomycete (Sordariales: Lasiosphaeriaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by erumpent stroma Diatrypella favacea - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by immersed, clustered, stromatic perithecium Diatrypella favacea - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by effuse stroma Eutypa lata - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by stromatic, immersed perithecium Eutypa lata - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by subcortical stroma Eutypella scoparia - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997 [under bark]
branch (dead) dead branch is decayed by subcortical synnema of Harpographium anamorph synnemata Eutypella scoparia - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997 [under bark]
branch (dead) dead branch is decayed by subcortical, immersed, in clusters of 7-15, erumpent necked perithecium Eutypella scoparia - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997 [under bark]
branch (dead) dead branch is decayed by stroma Hypoxylon howeanum - a stromatic pyrenomycete (Xylariales: Xylariaceae) UK/Ireland Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Geniculosporium anamorph Hypoxylon howeanum - a stromatic pyrenomycete (Xylariales: Xylariaceae) UK/Ireland Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Nodulisporium anamorph Hypoxylon multiforme - Birch Woodwart (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by superficial or erumpent stroma Nemania serpens - a stromatic pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by effuse colony of Geniculosporium dematiaceous anamorph Nemania serpens - a stromatic pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (fallen, dead, esp. covered by leaf mould) fallen, dead, esp. covered by leaf mould branch is decayed by perithecium Chaetosphaeria inaequalis - a pyrenomycete (Chaetosphaeriales: Chaetosphaeriaceae) Ellis, M.B. & J.P., 1997 [especially when covered by leaf mould]
branch (fallen, dead, esp. covered by leaf mould) fallen, dead, esp. covered by leaf mould branch is decayed by colony of Gonytrichum dematiaceous anamorph Chaetosphaeria inaequalis - a pyrenomycete (Chaetosphaeriales: Chaetosphaeriaceae) Ellis, M.B. & J.P., 1997 [especially when covered by leaf mould]
branch (fallen, dead) fallen, dead branch is decayed by effuse colony of Helminthosporium dematiaceous anamorph Helminthosporium velutinum - a dematiaceous anamorphic fungus (Pleosporales: Massarinaceae) Ellis, M.B. & J.P., 1997
branch (fallen, dead) fallen, dead branch is decayed by colony of Catenularia dematiaceous anamorph Chaetosphaeria myriocarpa - a pyrenomycete (Chaetosphaeriales: Chaetosphaeriaceae) Ellis, M.B. & J.P., 1997
branch (fallen, dead) fallen, dead branch is decayed by perithecium Chaetosphaeria myriocarpa - a pyrenomycete (Chaetosphaeriales: Chaetosphaeriaceae) Ellis, M.B. & J.P., 1997
branch (fallen) fallen branch is decayed by apothecium Bisporella sulfurina - a discomycete (Helotiales: Helotiaceae) Ellis, M.B. & J.P., 1997 [often overgrowing stromatic pyrenomycetes]
branch (moribund) moribund branch may contain larva Tetrops praeustus - Plum Longhorn Beetle, Plum Beetle (Coleoptera: Cerambycidae) Bullock, J.A., 1992
branch (rotten) rotten branch is decayed by often long-stalked apothecium Lachnum brevipilosum - a discomycete (Helotiales: Hyaloscyphaceae) Ellis, M.B. & J.P., 1997
branch (small) (dead, still attached to fallen tree) dead, still attached to fallen tree branch (small) is decayed by fruitbody Polyporus brumalis - Winter Polypore (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
branch wood (dry, hard, decorticate) dry, hard, decorticate branch wood is decayed by superficial pycnidium of Aposphaeria coelomycetous anamorph Melanomma pulvis-pyrius - an ascomycete (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
branch wood (dry, hard, decorticate) dry, hard, decorticate branch wood is decayed by superficial, often in very large clusters pseudothecium Melanomma pulvis-pyrius - an ascomycete (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
branch? (small dead) small dead branch? may contain Acalles misellus - a weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002
branch branch is swollen by immersed stroma Botryosphaeria obtusa - an ascomycete (Botryosphaeriales: Botryosphaeriaceae) Ellis, M.B. & J.P., 1997 [causes cankers and dieback]
branch branch is swollen by stromatic pseudothecium Botryosphaeria obtusa - an ascomycete (Botryosphaeriales: Botryosphaeriaceae) Ellis, M.B. & J.P., 1997 [causes cankers and dieback]
branch branch is galled by haustorium Viscum album - Mistletoe (Santalales: Santalaceae) UK/Ireland Major Redfern, M. & Shirley, P., 2002
branch branch is parasitised by haustorium Viscum album - Mistletoe (Santalales: Santalaceae) UK/Ireland Major Stace, C., 1997
branch branch is decayed by immersed, grouped in circles perithecium Valsa ambiens - a valsoid pyrenomycete (Diaporthales: Valsaceae) Ellis, M.B. & J.P., 1997 [extending uniformly along the whole length of twigs and branches]
branch branch is decayed by subgregarious to densely scattered, covered then erumpent, blackish grey with paler roundish flat disc stroma of Cytospora coelomycetous anamorph Valsa ambiens - a valsoid pyrenomycete (Diaporthales: Valsaceae) Ellis, M.B. & J.P., 1997 [extending uniformly along the whole length of twigs and branches]
bud (live) live bud may contain caterpillar Zeuzera pyrina - Leopard Moth (Lepidoptera: Cossidae) Buczacki, S. & Harris, K., 1998
cambium of dead twig (below) below cambium of dead twig is mined by larva Magdalis (Panus) barbicornis - Pear Weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002,
Bullock, J.A., 1992
cambium cambium may contain larva Scolytus mali - Large Fruit Bark Beetle (Coleoptera: Curculionidae) Bullock, J.A., 1992
flower (esp. shaded) esp. shaded flower is visited for nectar and/or pollen by imago Anoplodera sexguttata - Six-spotted Longhorn Beetle, 6-spotted Longhorn (Coleoptera: Cerambycidae) Duff, A. (Illust: Lewington, R.), 2006 [especially in shaded woodland clearings]
flower (live, blotched) live, blotched flower may be infected and damaged by colony of anamorph Monilinia johnsonii - Crataegus Blotch (Helotiales: Sclerotiniaceae) Buczacki, S. & Harris, K., 1998 [causes large brown lesions with sweet-smelling mouldy growth]
flower flower may be infected and damaged by Erwinia amylovora - Fireblight Buczacki, S. & Harris, K., 1998
flower flower is visited for nectar and/or pollen by imago Anaglyptus mysticus - Rufous-shouldered Longhorn Beetle, "Mysterious Wallpaper Beetle" (Coleoptera: Cerambycidae) Bullock, J.A., 1992
flower flower is visited for nectar and/or pollen by imago Stictoleptura scutellata - Large Black Longhorn Beetle (Coleoptera: Cerambycidae) Duff, A. (Illust: Lewington, R.), 2006
flower flower is visited for nectar and/or pollen by imago Grammoptera abdominalis - Black Grammoptera (Coleoptera: Cerambycidae) Major Duff, A. (Illust: Lewington, R.), 2006
flower flower is visited for nectar and/or pollen by Grammoptera ruficornis - Common Grammoptera (Coleoptera: Cerambycidae) Major Duff, A. (Illust: Lewington, R.), 2006
flower flower is visited for nectar and/or pollen by adult Myopa - a genus of thick-headed flies (Diptera: Conopidae) Smith, K.G.V., 1969
flower flower is visited for nectar and/or pollen by imago Hoplocampa crataegi - a sawfly (Hymenoptera: Tenthredinidae) Benson, R.B., 1958
flower flower is visited for nectar and/or pollen by imago Hoplocampa pectoralis - a sawfly (Hymenoptera: Tenthredinidae) Benson, R.B., 1958
fruit (buried, fallen, over-wintered) buried, fallen, over-wintered fruit is decayed by erect, emergent from soil stroma Xylaria oxyacanthae - a stromatic pyrenomycete (Xylariales: Xylariaceae) UK/Ireland Ellis, M.B. & J.P., 1997
fruit (dead) dead fruit is decayed by densely clustered, immersed then breaking through pycnidium of Sclerophoma coelomycetous anamorph Sclerophoma mali - a coelomycete UK/Ireland Grove, W.B., 1935
fruit (developing, usually falls when larva matures) developing, usually falls when larva matures fruit may contain larva Hoplocampa crataegi - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958 [generally falls off when larva is mature]
fruit (developing, usually falls when larva matures) developing, usually falls when larva matures fruit may contain larva Hoplocampa pectoralis - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958 [generally falls off when larva is mature]
fruit (fallen, over-wintered, stromatised) fallen, over-wintered, stromatised fruit is decayed by one to four, long-stalked apothecium Monilinia johnsonii - Crataegus Blotch (Helotiales: Sclerotiniaceae) UK/Ireland Ellis, M.B. & J.P., 1997
fruit fruit may contain larva Neocoenorrhinus aequatus - Apple Fruit Rhynchites (Coleoptera: Rhynchitidae) Major Morris, M.G., 1990,
Bullock, J.A., 1992
fruit fruit may contain larva Rhynchites bacchus - a leafroller weevil (Coleoptera: Rhynchitidae) Morris, M.G., 1990
haw (mummified) mummified haw may be infected and damaged by colony of anamorph Monilinia johnsonii - Crataegus Blotch (Helotiales: Sclerotiniaceae) Buczacki, S. & Harris, K., 1998
haw haw has sap sucked by adult Acanthosoma haemorrhoidale - Hawthorn Shieldbug (Hemiptera: Acanthosomatidae) Major Southwood, T.R.E. & Leston, D., 1959
haw haw has sap sucked by nymph Acanthosoma haemorrhoidale - Hawthorn Shieldbug (Hemiptera: Acanthosomatidae) Major Southwood, T.R.E. & Leston, D., 1959
leaf (brown, fallen, locally bleached) brown, fallen, locally bleached leaf is decayed by hysteroid apothecium Lophodermium foliicola - a discomycete (Rhytismatales: Rhytismataceae) Ellis, M.B. & J.P., 1997
leaf (dead, fallen) dead, fallen leaf is decayed by immersed pseudothecium Venturia crataegi - an ascomycete (Pseudosphaeriales: Venturiaceae) Ellis, M.B. & J.P., 1997
leaf (dead) dead leaf is decayed by hypophyllous, immersed pseudothecium Mycosphaerella crataegi - an ascomycete (Capnodiales: Mycosphaerellaceae) Ellis, M.B. & J.P., 1997
leaf (fallen, usually decayed) fallen, usually decayed leaf is decayed by fruitbody Phaeogalera dissimulans - a toadstool (Agaricales: Strophariaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
leaf (live) live leaf is galled by Eriophyes goniothorax - a gall mite (Trombidiformes: Eriophyidae) Stubbs, F.B. (Editor), 1986
leaf (live) live leaf is galled by Eriophyes goniothorax subsp. typicus - Hawthorn Leaf-roll Gall-mite (Trombidiformes: Eriophyidae) Stubbs, F.B. (Editor), 1986 ["Hawthorn Leaf-roll Gall"]
leaf (live) live leaf is galled by Eriophyes pyri subsp. crataegi - a gall mite (Trombidiformes: Eriophyidae) Stubbs, F.B. (Editor), 1986
leaf (live) live leaf is galled by mostly hypophyllous aecium Gymnosporangium asiaticum - Japanese Pear Rust (Pucciniales: Pucciniaceae) Foreign Laundon, G., 1977 [causes thickened brown spot on leaf]
leaf (live) live leaf is mined by caterpillar Lyonetia clerkella - Apple Leaf Miner (Lepidoptera: Lyonetiidae) Buczacki, S. & Harris, K., 1998 [narrow sinuous mine]
leaf (live) live leaf is grazed by caterpillar Abraxas grossulariata - Magpie Moth (Lepidoptera: Geometridae) Buczacki, S. & Harris, K., 1998
leaf (live) live leaf is grazed by colonial, tented caterpillar Euproctis chrysorrhoea - Brown-tail (Lepidoptera: Erebidae) Buczacki, S. & Harris, K., 1998
leaf (live) live leaf is grazed by caterpillar Euproctis similis - Yellow-tail (Lepidoptera: Erebidae) Buczacki, S. & Harris, K., 1998
leaf (live) live leaf is grazed by caterpillar Orgyia antiqua - Vapourer Moth (Lepidoptera: Erebidae) Buczacki, S. & Harris, K., 1998
leaf (live) live leaf is grazed by caterpillar Acronicta psi - Grey Dagger (Lepidoptera: Noctuidae) Buczacki, S. & Harris, K., 1998
leaf (live) live leaf is parasitised by epiphyllous pycnium Gymnosporangium asiaticum - Japanese Pear Rust (Pucciniales: Pucciniaceae) Foreign Laundon, G., 1977
leaf (live) live leaf is spotted by Cercospora dematiaceous anamorph Cercospora crataegi - Hawthorn Leaf-spot (Capnodiales: Mycosphaerellaceae) UK/Ireland Dennis, R.W.G., 1995
leaf (live) live leaf is spotted by hypophyllous, aggregated, smoky brown acervulus of Phloeospora coelomycetous anamorph Phloeospora oxyacanthae - Crataegus Leaf Spot (Capnodiales: Mycosphaerellaceae) UK/Ireland Buczacki, S. & Harris, K., 1998,
Grove, W.B., 1935 [causes spots of variable size which become yellow or borwn and often spread to scorch the entire leaf. Spore mass pale yellowish]
leaf (live) live leaf is spotted by pycnidium of Septoria coelomycetous anamorph Septoria crataegi - (A Coelomycetous Leaf-spot Fungus) Foreign Buczacki, S. & Harris, K., 1998 [causes tiny red-brown spots with paler centres]
leaf (live) live leaf is spotted by epiphyllous, subcuticular acervulus of Entomosporium coelomycetous anamorph Diplocarpon mespili - an ascomycete (Helotiales: Dermateaceae) Major Ellis, M.B. & J.P., 1997 [causes small reddish spots]
leaf (live) live leaf is spotted by effuse colony of Monilia dematiaceous anamorph Monilinia johnsonii - Crataegus Blotch (Helotiales: Sclerotiniaceae) UK/Ireland Ellis, M.B. & J.P., 1997 [causes large brown or black blotches]
leaf (live) live leaf is grazed by web-dwelling hypophyllous, colonial Panonychus ulmi - Fruit Tree Red Spider Mite (Trombidiformes: Tetranychidae) Buczacki, S. & Harris, K., 1998 [causes progressive light speckling, bronzing and dessication]
leaf (live) live leaf is grazed by web-dwelling communal caterpillar Malacosoma neustria - The Lackey (Lepidoptera: Lasiocampidae) Buczacki, S. & Harris, K., 1998
leaf (live) live leaf is grazed by web-dwelling communal caterpillar Scythropia crataegella - Hawthorn Moth, Hawthorn Webber Moth (Lepidoptera: Yponomeutidae) Buczacki, S. & Harris, K., 1998
leaf (midrib) leaf (midrib) may contain larva Neocoenorrhinus pauxillus - a leafroller weevil (Coleoptera: Rhynchitidae) Morris, M.G., 1990,
Bullock, J.A., 1992
leaf (petiole) leaf (petiole) may contain larva Neocoenorrhinus pauxillus - a leafroller weevil (Coleoptera: Rhynchitidae) Morris, M.G., 1990,
Bullock, J.A., 1992
leaf (upperside) leaf (upperside) is grazed by flattened larva Dineura stilata - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958 [leaving lower cuticle intact]
leaf (yellow, then brown, then drop) yellow, then brown, then drop leaf may be infected and damaged by Erwinia amylovora - Fireblight Buczacki, S. & Harris, K., 1998
leaf margin (live) live leaf margin is galled by Taphrina crataegi - a tongue fungus (Taphrinales: Taphrinaceae) Ellis, M.B. & J.P., 1997 [causes reddish-yellow blisters up to 1cm diam. along margins which become inrolled]
leaf of soft shoot, hedge tree (live) live leaf of soft shoot of hedge tree is parasitised by cleistothecium Podosphaera clandestina - Hawthorn Mildew (Erysiphales: Erysiphaceae) Ellis, M.B. & J.P., 1997
leaf-litter leaf-litter is decayed by immersed or erumpent perithecium Gnomonia alni-viridis - a pyrenomycete (Diaporthales: Gnomoniaceae) Ellis, M.B. & J.P., 1997
leaf, litter (dead, decayed) dead, decayed leaf of litter is decayed by fruitbody Leucoagaricus serenus - a dapperling (Agaricales: Agaricaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
leaf, seedling (live) live leaf of seedling is parasitised by cleistothecium Podosphaera clandestina - Hawthorn Mildew (Erysiphales: Erysiphaceae) Ellis, M.B. & J.P., 1997
leaf? leaf? is grazed by adult Smaragdina affinis - a leaf beetle (Coleoptera: Chrysomelidae) Foreign Cox, M.L., 2007
leaf leaf is grazed by larva Lochmaea crataegi - Hawthorn Leaf Beetle (Coleoptera: Chrysomelidae) Bullock, J.A., 1992
leaf leaf is grazed by larva Arge ustulata - a sawfly (Hymenoptera: Argidae) Benson, R.B., 1951
leaf leaf is grazed by larva Trichiosoma tibiale - Hawthorn Sawfly (Hymenoptera: Cimbicidae) Restricted Benson, R.B., 1951
leaf leaf is grazed by epiphyllous larva Caliroa cerasi - Pear and Cherry Slug Sawfly (Hymenoptera: Tenthredinidae) Buczacki, S. & Harris, K., 1998,
Benson, R.B., 1952 [skeletonises the leaf, leaving one cuticle intact]
leaf leaf is grazed by larva Cladius (Priophorus) pallipes - a sawfly (Hymenoptera: Tenthredinidae) Benson, R.B., 1958
leaf leaf is grazed by larva Cladius (Priophorus) pilicornis - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958
leaf leaf is grazed by social larva Nematus (Nematus) lucidus - a sawfly (Hymenoptera: Tenthredinidae) Benson, R.B., 1958
leaf leaf is grazed by larva Pristiphora (Pristiphora) armata - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958
leaf leaf is rolled by larva Pamphilius sylvaticus - a sawfly (Hymenoptera: Pamphiliidae) Benson, R.B., 1951
leaf leaf has sap sucked by adult Acanthosoma haemorrhoidale - Hawthorn Shieldbug (Hemiptera: Acanthosomatidae) Southwood, T.R.E. & Leston, D., 1959
leaf leaf has sap sucked by nymph Acanthosoma haemorrhoidale - Hawthorn Shieldbug (Hemiptera: Acanthosomatidae) Southwood, T.R.E. & Leston, D., 1959
leaf leaf is grazed by web-dwelling communal larva Neurotoma saltuum - a sawfly (Hymenoptera: Pamphiliidae) Benson, R.B., 1951
litter litter is decayed by fruitbody Volvariella reidii - a rosegill (Agaricales: Pluteaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
ovary ovary may house ovum Hoplocampa crataegi - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958
ovary ovary may house ovum Hoplocampa pectoralis - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958
petal (live) live petal is foodplant of adult Byturus tomentosus - Raspberry Beetle (Coleoptera: Byturidae) Buczacki, S. & Harris, K., 1998
pollen (live) live pollen is foodplant of adult Byturus tomentosus - Raspberry Beetle (Coleoptera: Byturidae) Buczacki, S. & Harris, K., 1998
root (dead, buried, decayed) dead, buried, decayed root is decayed by fruitbody Psathyrella conopilus - Conical Brittlestem (Agaricales: Psathyrellaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
shoot (decaying) decaying shoot may contain larva Involvulus caeruleus - Apple Twig Cutter, Twig Cutting Weevil, Twig-cutting Weevil (Coleoptera: Rhynchitidae) Major Morris, M.G., 1990,
Bullock, J.A., 1992
shoot tip (live) live shoot tip is galled by larva Dasineura crataegi - Hawthorn Button Top Midge (Diptera: Cecidomyiidae) Buczacki, S. & Harris, K., 1998 [causes a rosette gall],
Stubbs, F.B. (Editor), 1986
soil, bush soil of bush is decayed by fruitbody Lepiota boertmannii - a dapperling (Agaricales: Agaricaceae) UK/Ireland Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [in limestone scrub]
stamen (live) live stamen is foodplant of adult Byturus tomentosus - Raspberry Beetle (Coleoptera: Byturidae) Buczacki, S. & Harris, K., 1998
stem (esp. base) stem (esp. base) is galled by Agrobacterium tumefaciens - Crown Gall - causative organism (Rhizobiales: Rhizobiaceae) Buczacki, S. & Harris, K., 1998
stem (live) live stem has sap sucked by Pulvinaria vitis - Woolly Currant Scale, Woolly Vine Scale, Woolly Vine Scale Insect (Hemiptera: Coccidae) Buczacki, S. & Harris, K., 1998
stick (dead, fallen, decayed) dead, fallen, decayed stick is decayed by fruitbody Skeletocutis nivea - Hazel Bracket (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
stick (dead, still attached to fallen tree) dead, still attached to fallen tree stick is decayed by fruitbody Polyporus brumalis - Winter Polypore (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
stump (fresh) fresh stump may be infected and damaged by mycelium Heterobasidion annosum - Root Rot, Root Fomes, White Pocket Rot - causative organism (Russulales: Bondarzewiaceae) UK/Ireland Rare Reid, D.A., 1978
stump (large) (dead, decayed, hollow) dead, decayed, hollow stump (large) is decayed by fruitbody Ossicaulis lignatilis - Mealy Oyster (Agaricales: Lyophyllaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [often inside hollow stumps]
stump (large) (dead) dead stump (large) is decayed by fruitbody Meripilus giganteus - Giant Polypore (Polyporales: Meripilaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
stump (large) (decayed, dead) decayed, dead stump (large) is decayed by caespitose fruitbody Kuehneromyces mutabilis - Sheathed Woodtuft, Velvet Tough-shank (Agaricales: Strophariaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
trunk (base) trunk (base) may be infected and damaged by fruitbody Meripilus giganteus - Giant Polypore (Polyporales: Meripilaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
trunk (esp. base) (live) live trunk (esp. base) is parasitised by fruitbody Phellinus torulosus - Tufted Bracket (Hymenochaetales: Hymenochaetaceae) UK/Ireland Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
trunk (large, decayed, fallen) large, decayed, fallen trunk is decayed by basidiome Ceriporia purpurea - a basidiomycete fungus (Polyporales: Phanerochaetaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [usually on calcareous soils]
trunk (large) (dead, decayed, fallen) dead, decayed, fallen trunk (large) is decayed by fruitbody Ossicaulis lignatilis - Mealy Oyster (Agaricales: Lyophyllaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
trunk (large) (dead, fallen, very decayed) dead, fallen, very decayed trunk (large) is decayed by fruitbody Polyporus durus - Bay Polypore (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
trunk (large) (dead) dead trunk (large) is decayed by fruitbody Meripilus giganteus - Giant Polypore (Polyporales: Meripilaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
trunk (large) (decayed, dead, fallen) decayed, dead, fallen trunk (large) is decayed by caespitose fruitbody Kuehneromyces mutabilis - Sheathed Woodtuft, Velvet Tough-shank (Agaricales: Strophariaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
trunk (live) live trunk is parasitised by fruitbody Phylloporia ribis - a bracket fungus (Hymenochaetales: Hymenochaetaceae) Rare Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
trunk trunk may be infected and damaged by basidiome Chondrostereum purpureum - Silverleaf Fungus (Agaricales: Cyphellaceae) Buczacki, S. & Harris, K., 1998
twig (cambium) twig (cambium) may contain larva Phytobia carbonaria - a leaf-mining fly (Diptera: Agromyzidae) Spencer, K.A., 1972
twig (dead, fallen) dead, fallen twig is decayed by stalked apothecium Hymenoscyphus imberbis - a discomycete (Helotiales: Helotiaceae) Ellis, M.B. & J.P., 1997 [in wet places]
twig (dead, still attached to fallen tree) dead, still attached to fallen tree twig is decayed by fruitbody Polyporus brumalis - Winter Polypore (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
twig (dead) dead twig is foodplant of larva Magdalis (Edo) ruficornis - a weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002
twig (dead) dead twig is decayed by immersed, in small groups, subiculate pseudothecium Otthia spiraeae - an ascomycete (Botryosphaeriales: Botryosphaeriaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by Diplodia coelomycetous anamorph Otthia spiraeae - an ascomycete (Botryosphaeriales: Botryosphaeriaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by immersed pseudothecium Mycosphaerella slaptoniensis - an ascomycete (Capnodiales: Mycosphaerellaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by immersed, solitary or in small group pseudothecium Karstenula shepherdiae - an ascomycete (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by pycnidium of Coniothyrium coelomycetous anamorph Karstenula shepherdiae - an ascomycete (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by erumpent stroma Diaporthe crataegi - a stromatic pyrenomycete (Diaporthales: Diaporthaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by immersed, stromatial perithecium Diaporthe crataegi - a stromatic pyrenomycete (Diaporthales: Diaporthaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by effuse stroma Eutypa lata - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by stromatic, immersed perithecium Eutypa lata - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
twig (fallen, dead) fallen, dead twig is decayed by effuse colony of Helminthosporium dematiaceous anamorph Helminthosporium velutinum - a dematiaceous anamorphic fungus (Pleosporales: Massarinaceae) Ellis, M.B. & J.P., 1997
twig (fallen, usually decayed) fallen, usually decayed twig is decayed by fruitbody Phaeogalera dissimulans - a toadstool (Agaricales: Strophariaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
twig (fallen) fallen twig is decayed by apothecium Bisporella sulfurina - a discomycete (Helotiales: Helotiaceae) Ellis, M.B. & J.P., 1997 [often overgrowing stromatic pyrenomycetes]
twig (fallen) fallen twig is decayed by loose, cotton colony of Costantinella anamorph Costantinella micheneri - an anamorphic fungus (Pezizales: Morchellaceae) Ellis, M.B. & J.P., 1997
twig? (dead) dead twig? may contain Acalles misellus - a weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002
twig twig is decayed by immersed, grouped in circles perithecium Valsa ambiens - a valsoid pyrenomycete (Diaporthales: Valsaceae) Ellis, M.B. & J.P., 1997 [extending uniformly along the whole length of twigs and branches]
twig twig is decayed by subgregarious to densely scattered, covered then erumpent, blackish grey with paler roundish flat disc stroma of Cytospora coelomycetous anamorph Valsa ambiens - a valsoid pyrenomycete (Diaporthales: Valsaceae) Ellis, M.B. & J.P., 1997 [extending uniformly along the whole length of twigs and branches]
wood (dead or rotten) dead or rotten wood is foodplant of Phloeophagus gracilis - a weevil (Coleoptera: Curculionidae) Morris, M.G., 2002
wood (dead, attached) dead, attached wood is decayed by fruitbody Hymenochaete cinnamomea - a resupinate fungus (Hymenochaetales: Hymenochaetaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, decayed, fallen) dead, decayed, fallen wood is decayed by fruitbody Ossicaulis lignatilis - Mealy Oyster (Agaricales: Lyophyllaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, decayed, often part buried) dead, decayed, often part buried wood is decayed by fruitbody Pluteus thomsonii - Veined Shield (Agaricales: Pluteaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, decayed) dead, decayed wood is decayed by fruitbody Psathyrella conopilus - Conical Brittlestem (Agaricales: Psathyrellaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, decayed) dead, decayed wood is decayed by fruitbody Psathyrella populina - a brittlestem (Agaricales: Psathyrellaceae) UK/Ireland Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, decayed) dead, decayed wood is decayed by fruitbody Hyphodontia crustosa - a resupinate fungus (Hymenochaetales: Schizoporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, decayed) dead, decayed wood is decayed by fruitbody Postia balsamea - a bracket fungus (Polyporales: Fomitopsidaceae) Rare Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, decayed) dead, decayed wood is decayed by fruitbody Postia stiptica - Bitter Bracket (Polyporales: Fomitopsidaceae) Rare Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, decaying) dead, decaying wood is decayed by fruitbody Polyporus durus - Bay Polypore (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, fallen, decayed) dead, fallen, decayed wood is decayed by fruitbody Postia tephroleuca - Greying Bracket, Greyling Bracket (Polyporales: Fomitopsidaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, fallen, decayed) dead, fallen, decayed wood is decayed by fruitbody Postia wakefieldiae - a bracket fungus (Polyporales: Fomitopsidaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, fallen, decayed) dead, fallen, decayed wood is decayed by Helicogloea lagerheimii - a ustilaginomycete (Atractiellales: Phleogenaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, fallen) dead, fallen wood is decayed by fruitbody Hymenochaete cinnamomea - a resupinate fungus (Hymenochaetales: Hymenochaetaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead, white-rotten) dead, white-rotten wood is decayed by fruitbody Lenzites betulina - Birch Mazegill (Polyporales: Polyporaceae) Rare Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead) dead wood is foodplant of Rhopalomesites tardyi - Holly Weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002
wood (dead) dead wood is decayed by Camarosporium coelomycetous anamorph Camarosporium crataegi - a coelomycete (Botryosphaeriales) UK/Ireland Dennis, R.W.G., 1995
wood (dead) dead wood is decayed by sessile apothecium Mollisia cinerea - Common Grey Disco (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
wood (dead) dead wood is decayed by effuse colony of Pseudospiropes dematiaceous anamorph Pseudospiropes subuliferus - a dematiaceous anamorphic fungus (Helotiales: Helotiaceae) UK/Ireland Dennis, R.W.G., 1995,
Ellis, M.B. & J.P., 1997
wood (dead) dead wood is decayed by narrowly stalked apothecium Orbilia cyathea - a glasscup (Orbiliales: Orbiliaceae) Ellis, M.B. & J.P., 1997
wood (dead) dead wood is decayed by stroma Eutypa flavovirens - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
wood (dead) dead wood is decayed by stromatic, immersed perithecium Eutypa flavovirens - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
wood (dead) dead wood is decayed by fruitbody Hymenochaete rubiginosa - Oak Curtain Crust (Hymenochaetales: Hymenochaetaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead) dead wood is decayed by fruitbody Oxyporus populinus - Poplar Bracket (Hymenochaetales: Schizoporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead) dead wood is decayed by fruitbody Polyporus brumalis - Winter Polypore (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (dead) dead wood is decayed by fruitbody Trametes hirsuta - Hairy Bracket (Polyporales: Polyporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [esp. calcareous soil]
wood (decayed) decayed wood is decayed by fruitbody Botryobasidium pruinatum - a resupinate fungus (Cantharellales: Botryobasidiaceae) UK/Ireland Major Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (decayed) decayed wood is decayed by basidiome Ceriporia viridans - a basidiomycete fungus (Polyporales: Phanerochaetaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (fallen, decayed) fallen, decayed wood is decayed by fruitbody Byssomerulius corium - Netted Crust (Polyporales: Phanerochaetaceae) UK/Ireland Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (live) live wood is parasitised by fruitbody Oxyporus populinus - Poplar Bracket (Hymenochaetales: Schizoporaceae) Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [weakly parasitic]
wood (old) old wood is decayed by superficial perithecium Lasiosphaeria hirsuta - a pyrenomycete (Sordariales: Lasiosphaeriaceae) Ellis, M.B. & J.P., 1997
wood (rotting) rotting wood is decayed by superficial, closely packed in large clusters perithecium Lasiosphaeria spermoides - a pyrenomycete (Sordariales: Lasiosphaeriaceae) Ellis, M.B. & J.P., 1997
wood (usually decorticate) usually decorticate wood is decayed by short-stalked apothecium Lachnum cerinum - a discomycete (Helotiales: Hyaloscyphaceae) Ellis, M.B. & J.P., 1997
wood (wet) wet wood is decayed by apothecium Orbilia sarraziniana - a glasscup (Orbiliales: Orbiliaceae) Ellis, M.B. & J.P., 1997
wood, mature tree wood of mature tree may contain larva Agrilus (Anambus) sinuatus - Hawthorn Jewel Beetle (Coleoptera: Buprestidae) Bullock, J.A., 1992
wood wood is decayed by immersed perithecium Diaporthe rudis - a pyrenomycete (Diaporthales: Diaporthaceae) Ellis, M.B. & J.P., 1997 [immersed in wood with necks emerging through the bark, surrounded by a black line]
woody debris woody debris is decayed by loose, cotton colony of Costantinella anamorph Costantinella micheneri - an anamorphic fungus (Pezizales: Morchellaceae) Ellis, M.B. & J.P., 1997

Crataegus may be associated with more taxa listed at higher taxonomic level

PLANTAE
(plants)
TRACHEOPHYTA
(vascular plants)
MAGNOLIOPSIDA
(flowering plants)
EU-DICOTS
(dicotyledonous flowering plants)
ROSACEAE
(roses and fruit trees)
Broadleaved shrubs Broadleaved trees Trees with bark of low pH Trees (via Trees with bark of low pH) Broadleaved trees and shrubs Trees and shrubs Trees, shrubs, woody and climbing plants (via Broadleaved trees) Broadleaved trees, shrubs and climbers (via Broadleaved trees and shrubs)

References

Benson, R.B., 1951 Hymenoptera: 2. Symphyta. Section (a)
Benson, R.B., 1952 Hymenoptera: 2. Symphyta. Section (b)
Benson, R.B., 1958 Hymenoptera: 2. Symphyta. Section (c)
Briggs, J., 1995 Mistletoe - distribution, biology and the National Survey
Buczacki, S. & Harris, K., 1998 Pests, Diseases & Disorders of Garden Plants
Bullock, J.A., 1992 Host Plants of British Beetles: A List of Recorded Associations
Cox, M.L., 2007 Atlas of the Seed and Leaf Beetles of Britain and Ireland
Dennis, R.W.G., 1995 Fungi of the South East England
Duff, A. (Illust: Lewington, R.), 2006 Identification - Longhorn Beetles: Part 1
Ellis, M.B. & J.P., 1997 Microfungi on Land Plants: An Identification Handbook
Grove, W.B., 1935 British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia
Laundon, G., 1977 Gymnosporangium asiaticum Miyabe ex Yamada
Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 Checklist of the British and Irish Basidiomycota
Morris, M.G., 1990 Orthocerous Weevils
Morris, M.G., 1997 Broad-Nosed Weevils (Entiminae)
Morris, M.G., 2002 True Weevils (Part I): Family Curculionidae, subfamilies Raymondionyminae to Smicronychinae
Nau, B.S., 1984 Notes on the Recording and Identification of Psallus
Redfern, M. & Shirley, P., 2002 British Plant Galls - Identification of galls on plants and fungi
Reid, D.A., 1977 On the exceptional abundance of Verpa conica with notes on unusual occurrence of other fungi
Reid, D.A., 1978 Unusual hosts for some common British fungi
Smith, K.G.V., 1969 Diptera: Conopidae
Southwood, T.R.E. & Leston, D., 1959 Land and Water Bugs of the British Isles
Spencer, K.A., 1972 Diptera: Agromyzidae
Stace, C., 1997 New Flora of the British Isles (Ed 2)
Stubbs, F.B. (Editor), 1986 Provisional Keys to British Plant Galls
Whalley, A.J.S. & Watling, R., 1980 Daldinia concentrica versus Daldinia vernicosa
Yao, Y.-J. & Spooner, B.M., 1996 Notes on British species of Tympanis (Leotiales) with T. prunicola new to Britain
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