Trifolium pratense (+ a mine Parectopa ononidis), Lauwersoog © Gerrit Tuinstra: for a plant a misfortune rarely occurs by itself

Melilotus officinalis, Dronten, Roggebotbos © Hans Jonkman

detail

mature cleistothecium

appendage (base)

gall

mycelium amphigenous, often occupying the entire leaf. Appressoria weakly lobed to multilobed, solitary or in opposite pairs. Conidia formed solitary, elliptic, without fibrosin bodies. Cleistothecia somewhat depressed, with 3-12 asci, containing 2-5 spores. Appendages 10-25, inserted on the equator, generally 2-6 x the diameter; they are 1-6 septate, the bases are stiff, horizontally extending, the later part is mycelioid; the tips are simple, sometimes forked.

host plants

Fabaceae, oligophagous

Acacia acinacea; Albizia; Amorpha fruticosa, glabra; Anthyllis montana, vulneraria & subsp. iberica + lapponica + maritima; Arachis; Bituminaria bituminosa; Colutea arborescens; Coronilla scorpioides, valentina; Cytisus austriacus, decumbens, hirsutus & subsp. polytrichus, purpureus, ruthenicus, scoparius, supinus; Dorycnium pentaphyllum subsp. herbaceum; Genista germanica, januensis, lydia, pilosa, radiata, sagittalis, tinctoria; Glycyrrhiza echinata; Halimodendron halodendron; Hippocrepis comosa, emerus; Lathyrus aphaca, hallersteinii, heterophyllus, hirsutus, japonicus, latifolius, laxiflorus, linifolius, magellanicus, niger, nissolia, ochrus, odoratus, palustris, pisiformis, pratensis, rotundifolius, sativus, sphaericus, sylvestris, tingitanus, tuberosus, vernus; Lembotropis nigricans; Lens culinaris; Lotus corniculatus, maritimus, pedunculatus, tetragonolobus; Melilotus albus, altissimus, dentatus, indicus, infestus, italicus, messanensis, officinalis, sulcatus, wolgicus; Onobrychis aequidentata, arenaria & subsp. miniata + lasiostachya + sibirica, caput-galli, montana, petraea, saxatilis, viciifolia; ? Ononis aragonensis; Paraserianthes lophantha; Piptanthus nepalensis; Scorpiurus muricatus; Securigera cretica, elegans, securidaca, varia; Thermopsis montana; Trifolium alexandrinum, alpestre, alpinum, ambiguum, arvense, aureum, badium, boissieri, campestre, canescens, diffusum, dubium, echinatum, fragiferum & subsp. bonannii, heldreichianum, hirtum, hybridum & subsp. elegans, incarnatum & subsp. molinerii, lupinaster, medium & subsp. balcanicum, micranthum, montanum, ochroleucon, pallidum, pannonicum, patens, pratense, purpureum, repens, rubens, spadiceum, stellatum, striatum, subterraneum, trichocephalum; Trigonella bicolor, caerulea, calliceras, coerulescens, cretica, foenum-graecum, gladiata, procumbens; Vicia cracca; Wisteria sinensis.

synonyms

Erysiphe martii Léveillé, 1851; Microsphaera trifolii (Gréville) Braun, 1981.

references

Ale-Agha, Boyle, Braun ao (2008a), Blumer (1946a, 1967a), Brandenburger (1972a), Braun (1995a), Braun & Cook (2012a), Braun, Kruse, Wolcan & Murace (2010a), Bresinsky (2016a), Czerniawska (2001a), Dietrich (2013a), Dynowska, Fiedorowicz & Kubiak (1999a), Dietrich (2016b), Doppelbaur & Doppelbaur (1973a), Fraiture & Vanderweyen (2009a), Gönczö & Révay (1981a), Jage, Kruse, Kummer ao (2013a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kruse, Thiel, Rätzel, ao (2020a), Korytnianska & Popova (2012a), Kozłowska, Mułenko & Heluta (2015a), Kruse (1914), Kruse & Jage (2014a), Leysen (2017a), Mayor (1967a), Mułenko, Sałata & Wołczańska (1995a), Negrean & Denchev (2000a), Piątek (2004a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Scheuer & Bechter (2012a), Scholler & Schubert (1993a), Sucharzewska, Dynowska, Kubiak ao (2012b), Tóth (1994a), Unamuno (1942a).