Hypericum tetrapterum Fr.
(Square-stalked St John’s-wort)

Interactions where Hypericum tetrapterum is the victim or passive partner (and generally loses out from the process)

The following relationships have been collated from the published literature (see 'Interaction References').

Filters:

Affected Part Summary Taxon Vernacular Classification References Darwin Classification of Active Taxon Active Taxon Active Vernacular Active Taxon Uncertain Active State Active Part Active Stage Relationship Relationship Uncertain Relationship Geography Darwin Classification of Passive Taxon Passive Taxon Passive Vernacular Passive Taxon Uncertain Passive State Passive Part Passive Stage Passive Taxon's significance to Active Taxon Indoors etc Season Summary
is parasitised by conidial anamorph UK/Ireland Erysiphe hyperici a powdery mildew Erysiphales: Erysiphaceae Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
An Introduction to British Powdery Mildews, Ing, B., 1990
 /Fungi/Ascomycota/Leotiomycetes/Erysiphales/Erysiphaceae/Erysiphe hyperici/Erysiphe hypericia powdery mildewconidial anamorph Foodplant / parasiteUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wort conidial anamorph parasitises
is parasitised by cleistothecium UK/Ireland Erysiphe hyperici a powdery mildew Erysiphales: Erysiphaceae Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
An Introduction to British Powdery Mildews, Ing, B., 1990
 /Fungi/Ascomycota/Leotiomycetes/Erysiphales/Erysiphaceae/Erysiphe hyperici/Erysiphe hypericia powdery mildewcleistothecium Foodplant / parasiteUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wort cleistothecium parasitises
flower flower is grazed by adult Chrysolina hyperici a leaf beetle Coleoptera: Chrysomelidae Atlas of the Seed and Leaf Beetles of Britain and Ireland, Cox, M.L., 2007
 /Animalia/Arthropoda/Insecta/Coleoptera/Chrysomelidae/Chrysolina hyperici/Chrysolina hypericia leaf beetleadult Foodplant / open feeder /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortflower (early 6-2)adult grazes on flower
leaf leaf is grazed by imago Major Chrysolina brunsvicensis a leaf beetle Coleoptera: Chrysomelidae Atlas of the Seed and Leaf Beetles of Britain and Ireland, Cox, M.L., 2007
 /Animalia/Arthropoda/Insecta/Coleoptera/Chrysomelidae/Chrysolina brunsvicensis/Chrysolina brunsvicensisa leaf beetleimago Foodplant / open feeder /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortleafMajor (1-12)imago grazes on leaf
leaf leaf is grazed by adult Chrysolina hyperici a leaf beetle Coleoptera: Chrysomelidae Atlas of the Seed and Leaf Beetles of Britain and Ireland, Cox, M.L., 2007
 /Animalia/Arthropoda/Insecta/Coleoptera/Chrysomelidae/Chrysolina hyperici/Chrysolina hypericia leaf beetleadult Foodplant / open feeder /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortleaf (early 6-2)adult grazes on leaf
leaf leaf is grazed by nocturnal larva Tenthredo balteata a sawfly Hymenoptera: Tenthredinidae Hymenoptera: 2. Symphyta. Section (b), Benson, R.B., 1952
 /Animalia/Arthropoda/Insecta/Hymenoptera/Tenthredinidae/Tenthredo balteata/Tenthredo balteataa sawflynocturnallarva Foodplant / open feeder /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortleaf nocturnal larva grazes on leaf
leaf (distorted, brown) distorted, brown leaf is galled by Foreign Aculus hygrophilus Rose-of-Sharon Gall Mite Trombidiformes: Eriophyidae A damaging new pest to look out for on Hypericum calycinum (Rose-of-Sharon), Anon., 2009
 /Animalia/Arthropoda/Arachnida/Trombidiformes/Eriophyidae/Aculus hygrophilus/Aculus hygrophilusrose-of-Sharon gall mite Foodplant / gallForeign /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortdistorted, brownleaf causes gall of distorted, brown leaf
leaf (fading) fading leaf is spotted by mainly epiphyllous, brown pycnidium of Septoria coelomycetous anamorph UK/Ireland Septoria hyperici a leaf-spot fungus Capnodiales: Mycosphaerellaceae Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidia, Grove, W.B., 1935
 /Fungi/Ascomycota/Dothideomycetes/Capnodiales/Mycosphaerellaceae/Septoria hyperici/Septoria hypericia leaf-spot fungusmainly epiphyllous, brownpycnidiumSeptoria coelomycetous anamorph Foodplant / spot causerUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortfadingleaf (8-10)mainly epiphyllous, brown pycnidium of Septoria coelomycetous anamorph causes spots on fading leaf
leaf (live) live leaf is grazed by nocturnal adult Chrysolina varians a leaf beetle Coleoptera: Chrysomelidae Atlas of the Seed and Leaf Beetles of Britain and Ireland, Cox, M.L., 2007
 /Animalia/Arthropoda/Insecta/Coleoptera/Chrysomelidae/Chrysolina varians/Chrysolina variansa leaf beetlenocturnaladult Foodplant / open feeder /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortliveleaf (6-10,3-)nocturnal adult grazes on live leaf
leaf (live) live leaf is parasitised by hypophyllous, subepidermal telium UK/Ireland Melampsora hypericorum Hypericum Rust, Tutsan Rust Pucciniales: Melampsoraceae British Rust Fungi, Wilson, M., & Henderson, D., 1966
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Melampsoraceae/Melampsora hypericorum/Melampsora hypericorumhypericum rust, tutsan rusthypophyllous, subepidermaltelium Foodplant / parasiteUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortliveleaf hypophyllous, subepidermal telium parasitises live leaf
leaf (live) live leaf is parasitised by hypophyllous, caeomoid aecium UK/Ireland Melampsora hypericorum Hypericum Rust, Tutsan Rust Pucciniales: Melampsoraceae British Rust Fungi, Wilson, M., & Henderson, D., 1966
 /Fungi/Basidiomycota/Pucciniomycetes/Pucciniales/Melampsoraceae/Melampsora hypericorum/Melampsora hypericorumhypericum rust, tutsan rusthypophyllous, caeomoidaecium Foodplant / parasiteUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortliveleaf (5-10)hypophyllous, caeomoid aecium parasitises live leaf
stem (dead) dead stem is decayed by acervulus of Seimatosporium coelomycetous anamorph UK/Ireland Seimatosporium hypericinum a coelomycete Xylariales: Amphisphaeriaceae Microfungi on Land Plants: An Identification Handbook, Ellis, M.B. & J.P., 1997
 /Fungi/Ascomycota/Sordariomycetes/Xylariales/Amphisphaeriaceae/Seimatosporium hypericinum/Seimatosporium hypericinuma coelomyceteacervulusSeimatosporium coelomycetous anamorph Foodplant / saprobeUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Malpighiales/Hypericaceae/Hypericum tetrapterum/Hypericum tetrapterumsquare-stalked St John’s-wortdeadstem acervulus of Seimatosporium coelomycetous anamorph is saprobic on dead stem

Author & YearTitleSource
Anon., 2009A damaging new pest to look out for on Hypericum calycinum (Rose-of-Sharon)Plant Clinic News Feb 09: 2.
Benson, R.B., 1952Hymenoptera: 2. Symphyta. Section (b)Handbooks for the Identification of British Insects , Vol VI, Part 2(b), 137pp, The Royal Entomological Society of London
Cox, M.L., 2007Atlas of the Seed and Leaf Beetles of Britain and Ireland336pp, Pisces Publications
Ellis, M.B. & J.P., 1997Microfungi on Land Plants: An Identification Handbook2nd (New Enlarged) edition, 868pp, The Richmond Publishing Co. Ltd
Grove, W.B., 1935British Stem- and Leaf- Fungi: Coelomycetes Vol. I … Sphaeropsidales with hyaline conidiaVol I, 488pp, Cambridge University Press
Ing, B., 1990An Introduction to British Powdery MildewsMycologist Vol 4 (1) et seq.
Wilson, M., & Henderson, D., 1966British Rust Fungi384pp, Cambridge University Press

Hypericum tetrapterum (Square-stalked St John’s-wort) may also be included in 'fed on by' relations listed under the following higher taxa:

Taxonomic hierarchy:
SpeciesHypericum tetrapterum (Square-stalked St John’s-wort)
GenusHypericum (St John’s worts)
FamilyHYPERICACEAE (St John’s-worts)
OrderMALPIGHIALES (poplars, willows, St John’s worts, spurges and violets)
SubclassEU-DICOTS (dicotyledonous flowering plants)
ClassMAGNOLIOPSIDA (flowering plants)
PhylumTRACHEOPHYTA (vascular plants)
KingdomPLANTAE (plants)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
NBNNBN (data.nbn.org.uk) has a distribution map for Hypericum tetrapterum (Square-stalked St John’s-wort)

Hypericum tetrapterum (Square-stalked St John’s-wort) may be included in identification literature listed under the following higher taxa:

Literature listed under the following higher taxa may be relevant to Hypericum tetrapterum (Square-stalked St John’s-wort):

BioImagesBioImages (www.bioimages.org.uk) has 9 images of Hypericum tetrapterum (Square-stalked St John’s-wort)
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