Erysiphe aquilegiae var. aquilegiae de Candolle, 1815

on Ranunculaceae

Erysiphe aquilegiae var aquilegiae on Ranunculus: cleistothecium

Ranunculus cf acris, Belgium, prov. Antwerp, Balen, Scheps © Carina Van Steenwinkel: cleistothecia with appendages

gall

mycelium white, amphigenous. Conidia solitary, without fibrosin bodies. Cleistothecia with 3-8 asci, that contain 3-5 spores. The appendages of the cleistothecium are brown, rather coarse and straight, stiff, septate, unbranched, and 3-12 times its diameter.

host plants

Ranunculaceae, monophagous

Aconitum; Actaea pachypoda, spicata; Aquilegia alpina, atrata, aurea, buergeriana, caerulea, dichroa, einseleana, flabellata, formosa, fragrans, glandulosa, kitaibelii, lactiflora, longissima, nigricans, olympica, ottonis, oxysepala, pyrenaica, sibirica, transsilvanica, viridiflora, vulgaris; Caltha palustris; Clematis jackmanii, paniculata, recta, vitalba, viticella; Ranunculus aconitifolius, cf. acris, platanifolius; Thalictrum aquilegiifolium.

The statement by Klenke & Scholler that this form would occur only on white-flowering Ranunculus species is contradicted by the picture above.

references

Blumer (1946a), Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Doppelbaur & Doppelbaur (1973a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (1995a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Scheuer & Bechter (2012a), Scholler, Reinhard & Schubert (1996a), Ruszkiewicz-Michalska (2006a), Scholler & Schubert (1993a).

mod 19.vii.2019