Galeopsis tetrahit, Flevoland, Reve-Abbertbos © Hans Jonkman

young and ripe cleistothecia

Lamium purpureum, Beuningen ov

gall

mycelium dense, white, amphigenous, often covering the entire leaf. Appressoria lobed, often paired. Conidia barrel-shaped, formed in rather short chains, without fibrosin bodies. Cleistothecia globular, dark, with abundant, unspecialised appendages that originate below the equator, up to twice as long as the diameter; the asci form spores only after they have gone through the winter.

host plants

Acanthaceae, Bignoniaceae, Lamiaceae, Malvaceae, polyphagous

Acanthus hungaricus, mollis, spinosus; Agastache; Ajuga chamaepitys & subsp. chia, genevensis, laxmannii, pyramidalis, reptans, salicifolia; Alcea rosea; Ballota hirsuta, nigra & subsp. foetida; Catalpa bignonioides, x erubescens, speciosa; Chaiturus marrubiastrum; Clinopodium acinos, menthifolium, nepeta, vulgare; Dracocephalum ruyschiana; Eremostachys; Galeopsis angustifolia, bifida, ladanum, pubescens, segetum, speciosa, tetrahit; Glechoma hederacea, hirsuta; Lamium album, amplexicaule, confertum, galeobdolon & subsp. argentatum + montanum, garganicum, maculatum, orvala, purpureum & subsp. mollucellifolium; Leonurus cardiaca; Lycopus; Marrubium peregrinum, pestalozzae, vulgare; Meehania urticifolia; Melissa officinalis; Melittis melissophyllum; Monarda didyma; Nepeta cataria, grandiflora, nuda, racemosa, sibirica, ucranica & subsp. parviflora; Origanum vulgare; Phlomis herba-venti & subsp. pungens, tuberosa; Physostegia; Plectranthus forsteri; Prasium; Prunella; Rosmarinus officinalis; Salvia dumetorum, farinacea; Satureja coerulea, hortensis, montana; Scutellaria galericulata; Sideritis hirsuta, hyssopifolia, libanotica, montana, romana & subsp. purpurea; Stachys alopecuros, alpina, x ambigua, anisochila, annua, arvensis, byzantina, coccinea, cretica, germanica & subsp. cordigera, glutinosa, heraclea, iberica, leucoglossa, marrubiifolia, ocymastrum, officinalis, palustris, recta & subsp. labiosa. setifera, sylvatica, tymphaea; Thymus; Ziziphora capitata.

synonyms

Erysiphe galeopsidis de Candolle, 1815.

inquilines

Mycodiplosis melampsorae.

hyperparasites

Ampelomyces quisqualis.

notes

Braun & Cook mention, next to Leveilllula contractirostris, N. galeopsidis as the only mildews on Alcea rosea. Yet, the pictures above, taken from a declining hollyhock in a street garden, do not well fit in the description of galeopsidis, in particular regarding the appressoria and the long basal cell of the conidiophore.

references

Bahçecioğlu, Kabaktepe & Yildiz (2006a), Bahçecioğlu & Yildiz (2005a), Blumer (1946a, 1967), Brandenburger (1972a, 1985a), Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Czerniawska (2001a), Czerniawska, Madej, Adamska ao (2000a), Dietrich (2013a), Doppelbaur & Doppelbaur (1973a), Dynowska, Fiedorowicz & Kubiak (1999a), Fraiture & Vanderweyen (2009a) Hafellner (1980a), Heluta, Hayova, Tykhonenko ao (2010a), Henricot (2009a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Leysen (2017a), Mułenko, Sałata & Wołczańska (1995a), Negrean & Denchev (2004a), Piątek (2004a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a) , Schmid-Heckel (1985a), Scholler, Schmidt, Siahaan ao (2016a), Scholler & Schubert (1993a), Sucharzewska, Dynowska, Kubiak ao (2012b), Tóth (1994a), Wołczańska (2008a).