BioImages: The Virtual Field-Guide (UK)

Crataegus (hawthorns)

Subtaxa

Rank Taxon #photos #macrophotos #webs
Species Crataegus laevigata (Poiret) DC. (Midland Hawthorn) 16 20 2
Hybrid Crataegus laevigata x monogyna (C. x macrocarpa) Hegetschw. (Hybrid Hawthorn) 11    
Species Crataegus monogyna Jacq. (Hawthorn) 15   8

Suggested Literature

Crataegus may be covered by literature listed under:

BIOTA
(living things)
Eukaryota
(eukaryotes)
PLANTAE
(plants)
SPERMATOPHYTA
(vascular plants)
MAGNOLIOPSIDA
(flowering plants)
MAGNOLIIDAE
(dicotyledonous flowering plants)

Feeding and other inter-species relationships

Associated with Crataegus:

(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 (Sordariales: 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 swollen by stroma Botryosphaeria obtusa - an ascomycete (Dothideales: Botryosphaeriaceae) Ellis, M.B. & J.P., 1997 [causes cankers and dieback]
is foodplant of Polydrusus cervinus - a weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Polydrusus pterygomalis - a weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Phyllobius glaucus - a leaf weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Phyllobius oblongus - Brown Leaf Weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Phyllobius pyri - Common Leaf Weevil (Coleoptera: Curculionidae) Morris, M.G., 1997
is foodplant of Ramphus oxyacanthae - a beetle (Coleoptera) Bullock, J.A., 1992
is foodplant of imago Psallus ambiguus - a plantbug (Hemiptera: Miridae) UK/Ireland Nau, B.S., 1984
is foodplant of imago Psallus perrisi - a plantbug (Hemiptera: Miridae) UK/Ireland Nau, B.S., 1984
is foodplant of imago Psallus variabilis - a plantbug (Hemiptera: Miridae) Questionable Nau, B.S., 1984
is foodplant of imago Psallus wagneri - a plantbug (Hemiptera: Miridae) Nau, B.S., 1984
is decayed by stroma Diatrypella favacea - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Minor Ellis, M.B. & J.P., 1997
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) Questionable Bullock, J.A., 1992
is associate of Anthonomus bituberculatus - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is associate of Anthonomus chevrolati - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is associate of Anthonomus pedicularius - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is associate of Magdalis cerasi - a weevil (Coleoptera: Curculionidae) Bullock, J.A., 1992
is associate of imago Anthaxia nitidula - a jewel beetle (Coleoptera: Buprestidae) Bullock, J.A., 1992
is associate of fruitbody Agaricus lutosus - a mushroom (Agaricales: Agaricaceae) UK/Ireland Minor 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 Minor Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
is associate of fruitbody Coprinus poliomallus - an inkcap (Agaricales: Coprinaceae) 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) Minor Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
bark (dead) dead bark is decayed by Pseudospiropes anamorph Pseudospiropes subuliferus - a dematiaceous anamorphic fungus (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
bark (dead) dead bark is decayed by superficial or erumpent stroma Nemania effusa - a stromatic pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
bark (dead) dead bark is decayed by effuse colony of Geniculosporium anamorph Nemania effusa - a stromatic pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
bark (wet) wet bark is decayed by apothecium Orbilia sarraziniana - a glasscup (Orbiliaceae) Ellis, M.B. & J.P., 1997
berry berry is foodplant of adult Turdus viscivorus - Mistle Thrush (Passeriformes) UK/Ireland Briggs, J., 1995
branch (dead) dead branch is decayed by apothecium Mollisia caespiticia - a discomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by apothecium Mollisia cinerea - Common Grey Disco (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by 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 Pseudospiropes anamorph Strossmayeria basitricha - a discomycete (Helotiales: Helotiaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by apothecium Hyaloscypha hyalina - a discomycete (Helotiales: Hyaloscyphaceae) Minor Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by apothecium Lachnum fasciculare - a discomycete (Helotiales: Hyaloscyphaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by perithecium Lasiosphaeria caudata - a pyrenomycete (Sordariales: Lasiosphaeriaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Diatrype stigma - Common Tarcrust (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by stroma Eutypa lata - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by stroma Eutypella scoparia - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997 [under bark]
branch (dead) dead branch is decayed by 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 Nodulisporium anamorph Hypoxylon howeanum - a stromatic pyrenomycete (Xylariales: Xylariaceae) Minor Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by stroma Hypoxylon howeanum - a stromatic pyrenomycete (Xylariales: Xylariaceae) Minor Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Hypoxylon multiforme - Birch Woodwart (Xylariales: Xylariaceae) Minor Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Nodulisporium anamorph Hypoxylon multiforme - Birch Woodwart (Xylariales: Xylariaceae) Minor Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Nemania serpens - a stromatic pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Geniculosporium anamorph Nemania serpens - a stromatic pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch (dead) dead branch is decayed by Geniculosporium anamorph Rosellinia aquila - a pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997 [especially near the bottom of piles of brushwood]
branch (dead) dead branch is decayed by gregarious perithecium Rosellinia aquila - a pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997 [especially near the bottom of piles of brushwood]
branch (dead, decorticate) dead, decorticate branch is decayed by hysterothecium Hysterium angustatum - an ascomycete (Hysteriales: Hysteriaceae) Ellis, M.B. & J.P., 1997
branch (dead, fallen) dead, fallen branch is decayed by apothecium Tapesia fusca - a discomycete (Helotiales: Dermateaceae) Minor Ellis, M.B. & J.P., 1997
branch (dead, fallen) dead, fallen branch is decayed by apothecium Hymenoscyphus imberbis - a discomycete (Helotiales: Helotiaceae) Ellis, M.B. & J.P., 1997 [in wet places]
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 (fallen, dead) fallen, dead branch is decayed by Helminthosporium dematiaceous anamorph Helminthosporium velutinum - a dematiaceous anamorphic fungus (Pleosporales: Pleomassariaceae) Ellis, M.B. & J.P., 1997
branch (fallen, dead) fallen, dead branch is decayed by perithecium Chaetosphaeria myriocarpa - a pyrenomycete (Sordariales: Chaetosphaeriaceae) Ellis, M.B. & J.P., 1997
branch (fallen, dead) fallen, dead branch is decayed by Catenularia anamorph Chaetosphaeria myriocarpa - a pyrenomycete (Sordariales: Chaetosphaeriaceae) Ellis, M.B. & J.P., 1997
branch (fallen, dead) fallen, dead branch is decayed by perithecium Melanopsammella inaequalis - a pyrenomycete (Sordariales: Chaetosphaeriaceae) Ellis, M.B. & J.P., 1997 [especially when covered by leaf mould]
branch (fallen, dead) fallen, dead branch is decayed by Gonytrichum anamorph Melanopsammella inaequalis - a pyrenomycete (Sordariales: Chaetosphaeriaceae) Ellis, M.B. & J.P., 1997 [especially when covered by leaf mould]
branch (rotten) rotten branch is decayed by apothecium Lachnum brevipilosum - a discomycete (Helotiales: Hyaloscyphaceae) Ellis, M.B. & J.P., 1997
branch wood (dry, hard, decorticate) dry, hard, decorticate branch wood is decayed by Aposphaeria 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 pseudothecium Melanomma pulvis-pyrius - an ascomycete (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
branch branch is galled by haustoria Viscum album - Mistletoe (Viscaceae) UK/Ireland Redfern, M. & Shirley, P., 2002
branch branch is parasitised by haustorium Viscum album - Mistletoe (Viscaceae) 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 Cytospora anamorph 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 immersed, in ring of usually 3 to 8 perithecium Lopadostoma turgidum - a valsoid pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
branch branch is decayed by Cytospora anamorph Lopadostoma turgidum - a valsoid pyrenomycete (Xylariales: Xylariaceae) 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
cambium of dead twig (below) below cambium of dead twig is mined by larva Magdalis 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 flower is visited for nectar and/or pollen by imago Anoplodera sexguttata - Six-spotted Longhorn Beetle (Coleoptera: Cerambycidae) Duff, A. (Illust: Lewington, R.), 2007 [especially in shaded woodland clearings]
flower flower is visited for nectar and/or pollen by imago Stictoleptura scutellata - Large Black Longhorn Beetle (Coleoptera: Cerambycidae) Duff, A. (Illust: Lewington, R.), 2007
flower flower is visited for nectar and/or pollen by imago Grammoptera abdominalis - Black Grammoptera (Coleoptera: Cerambycidae) Major Duff, A. (Illust: Lewington, R.), 2007
flower flower is visited for nectar and/or pollen by Grammoptera ruficornis - Common Grammoptera (Coleoptera: Cerambycidae) Major Duff, A. (Illust: Lewington, R.), 2007
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,) buried, fallen, fruit is decayed by stroma Xylaria oxyacanthae - a stromatic pyrenomycete (Xylariales: Xylariaceae) Ellis, M.B. & J.P., 1997
fruit (developing) developing fruit may contain larva Hoplocampa crataegi - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958 [generally falls off when larva is mature]
fruit (developing) developing fruit may contain larva Hoplocampa pectoralis - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958 [generally falls off when larva is mature]
fruit (fallen, mummified) fallen, mummified fruit is decayed by apothecium Monilinia johnsonii - a discomycete (Helotiales: Sclerotiniaceae) Ellis, M.B. & J.P., 1997
fruit (live) live fruit is galled by aecia Gymnosporangium clavariiforme - a rust fungus (Uredinales: Pucciniaceae) Ellis, M.B. & J.P., 1997 [causing orange or reddish-brown swellings up to 2cm long]
fruit (live) live fruit is galled by pycnia Gymnosporangium clavariiforme - a rust fungus (Uredinales: Pucciniaceae) Ellis, M.B. & J.P., 1997 [causing orange or reddish-brown swellings up to 2cm long]
fruit fruit may contain larva Rhynchites 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
leaf (bleached area on brown, fallen) bleached area on brown, fallen leaf is decayed by apothecium Lophodermium foliicola - a discomycete (Rhytismatales: Rhytismataceae) Ellis, M.B. & J.P., 1997
leaf (dead) dead leaf is decayed by hypophyllous pseudothecium Mycosphaerella crataegi - an ascomycete (Mycosphaerellales: Mycosphaerellaceae) Ellis, M.B. & J.P., 1997
leaf (dead, fallen) dead, fallen leaf is decayed by immersed pseudothecium Venturia crataegi - an ascomycete (Pleosporales: Venturiaceae) Ellis, M.B. & J.P., 1997
leaf (live) live leaf is galled by Eriophyes goniothorax - a gall mite (Eriophyidae) Stubbs, F.B. (Editor), 1986
leaf (live) live leaf is galled by Eriophyes goniothorax typicus - Hawthorn Leaf-roll Gall-mite (Eriophyidae) Stubbs, F.B. (Editor), 1986 ["Hawthorn Leaf-roll Gall"]
leaf (live) live leaf is galled by Eriophyes pyri crataegi - a gall mite (Eriophyidae) Stubbs, F.B. (Editor), 1986
leaf (live) live leaf is galled by mainly hypophyllous aecia Gymnosporangium confusum - a rust fungus (Uredinales: Pucciniaceae) Ellis, M.B. & J.P., 1997 [causing thickened brownish spots with yellow margins]
leaf (live) live leaf is galled by mainly hypophyllous pycnia Gymnosporangium confusum - a rust fungus (Uredinales: Pucciniaceae) Ellis, M.B. & J.P., 1997 [causing thickened brownish spots with yellow margins]
leaf (live) live leaf is spotted by epiphyllous, subcuticular Entomosporium anamorph acervulus Diplocarpon mespili - an ascomycete (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997 [causes small reddish spots]
leaf (live) live leaf is spotted by effuse Monilia anamorph Monilinia johnsonii - a discomycete (Helotiales: Sclerotiniaceae) Ellis, M.B. & J.P., 1997 [causes large brown or black blotches]
leaf (midrib) leaf (midrib) may contain larva Rhynchites pauxillus - a leafroller weevil (Coleoptera: Rhynchitidae) Morris, M.G., 1990
Bullock, J.A., 1992
leaf (petiole) leaf (petiole) may contain larva Rhynchites 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 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 long 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 vein (live) live leaf vein is galled by hypophyllous aecia Gymnosporangium clavariiforme - a rust fungus (Uredinales: Pucciniaceae) Stubbs, F.B. (Editor), 1986
Ellis, M.B. & J.P., 1997 [causing orange or reddish-brown swellings up to 2cm long]
leaf vein (live) live leaf vein is galled by hypophyllous pycnia Gymnosporangium clavariiforme - a rust fungus (Uredinales: Pucciniaceae) Stubbs, F.B. (Editor), 1986
Ellis, M.B. & J.P., 1997 [causing orange or reddish-brown swellings up to 2cm long]
leaf, seedling (live) live leaf of seedling is parasitised by cleistothecium Podosphaera clandestina - Hawthorn Mildew (Erysiphales: Erysiphaceae) Ellis, M.B. & J.P., 1997
leaf-litter leaf-litter is decayed by perithecium Gnomonia alni-viridis - a pyrenomycete (Diaporthales: Valsaceae) Ellis, M.B. & J.P., 1997
leaf leaf is grazed by larva Lochmaea crataegi - Hawthorn Leaf Beetle (Coleoptera: Chrysomelidae) Bullock, J.A., 1992
leaf leaf is grazed by larva Orsodacne cerasi - a leaf beetle (Coleoptera: Orsodacnidae) Bullock, J.A., 1992
leaf leaf is grazed by larva Orsodacne lineola - a leaf beetle (Coleoptera: Orsodacnidae) Bullock, J.A., 1992
leaf leaf is grazed by larva Arge ustulata - a sawfly (Hymenoptera: Argiidae) 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 larva Caliroa cerasi - Pear And Cherry Slug Sawfly (Hymenoptera: Tenthredinidae) Benson, R.B., 1952 [skeletonises the leaf, leaving one cuticle intact]
leaf leaf is grazed by social larva Nematus lucidus - a sawfly (Hymenoptera: Tenthredinidae) Benson, R.B., 1958
leaf leaf is grazed by larva Priophorus pallipes - a sawfly (Hymenoptera: Tenthredinidae) Benson, R.B., 1958
leaf leaf is grazed by larva Priophorus pilicornis - a sawfly (Hymenoptera: Tenthredinidae) Restricted Benson, R.B., 1958
leaf leaf is grazed by larva Pristiphora crassicornis - 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 is grazed by web-dwelling communal larva Neurotoma saltuum - a sawfly (Hymenoptera: Pamphiliidae) Benson, R.B., 1951
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
shoot (decaying) decaying shoot may contain larva Rhynchites caeruleus - Apple Twig Cutter, 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 - a gall midge (Diptera: Cecidomyiidae) Stubbs, F.B. (Editor), 1986
stem (live) live stem is galled by pycnia Gymnosporangium clavariiforme - a rust fungus (Uredinales: Pucciniaceae) Stubbs, F.B. (Editor), 1986
Ellis, M.B. & J.P., 1997 [causing orange or reddish-brown swellings up to 2cm long]
stem (live) live stem is galled by aecia Gymnosporangium clavariiforme - a rust fungus (Uredinales: Pucciniaceae) Stubbs, F.B. (Editor), 1986
Ellis, M.B. & J.P., 1997 [causing orange or reddish-brown swellings up to 2cm long]
trunk (large, decayed, fallen) large, decayed, fallen trunk is decayed by basidiome Ceriporia purpurea - a basidiomycete fungus (Polyporales: Hapalopilaceae) Minor Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005 [usually on calcareous soils]
twig (cambium) twig (cambium) may contain larva Phytobia carbonaria - a leaf-mining fly (Diptera: Agromyzidae) Spencer, K.A., 1972
twig (dead) dead twig is foodplant of larva Magdalis ruficornis - a weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002
twig (dead) dead twig is decayed by immersed pseudothecium Mycosphaerella slaptoniensis - a fungus (Mycosphaerellales: Mycosphaerellaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by Coniothyrium anamorph pycnidia Karstenula shepherdiae - a fungus (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by immersed, solitary or in small group pseudothecium Karstenula shepherdiae - a fungus (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by erumpent conidioma Cytospora oxyacanthae - a coelomycete (Diaporthales: Valsaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by erumpent stroma Diaporthe crataegi - a stromatic pyrenomycete (Diaporthales: Valsaceae) Ellis, M.B. & J.P., 1997
twig (dead) dead twig is decayed by stroma Eutypa lata - a stromatic pyrenomycete (Xylariales: Diatrypaceae) Ellis, M.B. & J.P., 1997
twig (dead, fallen) dead, fallen twig is decayed by apothecium Hymenoscyphus imberbis - a discomycete (Helotiales: Helotiaceae) Ellis, M.B. & J.P., 1997 [in wet places]
twig (fallen) fallen twig is decayed by Costantinella anamorph Costantinella micheneri - an anamorphic fungus (Helotiales) Ellis, M.B. & J.P., 1997
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, dead) fallen, dead twig is decayed by Helminthosporium dematiaceous anamorph Helminthosporium velutinum - a dematiaceous anamorphic fungus (Pleosporales: Pleomassariaceae) Ellis, M.B. & J.P., 1997
twig/branch (dead) dead twig/branch is decayed by pseudothecium Otthia spiraeae - an ascomycete (Dothideales) Ellis, M.B. & J.P., 1997
twig/branch (dead) dead twig/branch is decayed by Diplodia anamorph Otthia spiraeae - an ascomycete (Dothideales) Ellis, M.B. & J.P., 1997
twig twig is decayed by Cytospora anamorph 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 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? (dead) dead twig? may contain Acalles misellus - a weevil (Coleoptera: Curculionidae) UK/Ireland Morris, M.G., 2002
wood (dead or rotten) dead or rotten wood is foodplant of Phloeophagus gracilis - a weevil (Coleoptera: Curculionidae) Morris, M.G., 2002
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 Pseudospiropes anamorph Pseudospiropes subuliferus - a dematiaceous anamorphic fungus (Pleosporales: Melanommataceae) Ellis, M.B. & J.P., 1997
wood (dead) dead wood is decayed by apothecium Mollisia cinerea - Common Grey Disco (Helotiales: Dermateaceae) Ellis, M.B. & J.P., 1997
wood (dead) dead wood is decayed by apothecium Orbilia cyathea - a glasscup (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 (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: Hapalopilaceae) Minor 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: Meruliaceae) UK/Ireland Minor Legon, N.W. & Henrici, A. with Roberts, P.J., Spooner, B.M. & Watling, R., 2005
wood (old) old wood is decayed by perithecium Lasiosphaeria hirsuta - a pyrenomycete (Sordariales: Lasiosphaeriaceae) Ellis, M.B. & J.P., 1997
wood (rotting) rotting wood is decayed by perithecium Lasiosphaeria spermoides - a pyrenomycete (Sordariales: Lasiosphaeriaceae) Ellis, M.B. & J.P., 1997
wood (usually decorticate) usually decorticate wood is decayed by 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 (Orbiliaceae) Ellis, M.B. & J.P., 1997
wood, mature tree wood of mature tree may contain larva Agrilus sinuatus - Hawthorn Jewel Beetle (Coleoptera: Buprestidae) Bullock, J.A., 1992
wood wood may contain larva Anaglyptus mysticus - a longhorn beetle (Coleoptera: Cerambycidae) Bullock, J.A., 1992
wood wood may contain larva Tetrops praeusta - a longhorn beetle (Coleoptera: Cerambycidae) Bullock, J.A., 1992
wood wood is decayed by perithecium Diaporthe rudis - a pyrenomycete (Diaporthales: Valsaceae) Ellis, M.B. & J.P., 1997 [immersed in wood with necks emerging through the bark]
woody debris woody debris is decayed by Costantinella anamorph Costantinella micheneri - an anamorphic fungus (Helotiales) Ellis, M.B. & J.P., 1997

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

MAGNOLIOPSIDA
(flowering plants)
MAGNOLIIDAE
(dicotyledonous flowering plants)
ROSACEAE
(roses and fruit trees)

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
Bullock, J.A., 1992 Host Plants of British Beetles: A List of Recorded Associations
Duff, A. (Illust: Lewington, R.), 2007 Identification - Longhorn Beetles: Part 1
Ellis, M.B. & J.P., 1997 Microfungi on Land Plants: An Identification Handbook
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
Smith, K.G.V., 1969 Diptera: Conopidae
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