Entyloma eburneum (Schröter) Kruse, Lutz, Piątek & Thines 2018

on Ranunculus

Entyloma eburneum: leaf spots on Ranunculus repens

Ranunculus repens, Belgium, prov. Antwerp, Balen, Griesbroek © Carina Van Steenwinkel

Entyloma eburneum: anamorph

anamorphic stage

Entyloma eburneum: conidia

anamorphic stage, acicular conidia

parasite

Ssori as pale, flat, sharly delimited hard pustules, up to 2 mm wide and 4 mm long, often adjacent to a vein. Embedded in the host tissue are groups if intercellular, hyaline-yellowish spores. The spores are globular, smooth, ø 11-14 µm, wall relatively thin, ± 1.5 µm thick, regular. Both at the upper side and the underside anamorphic spires are formed in colonies of dense bundles of conidiophores; de conidia in two types, cylindric 3-4 x 15-22 µm and acicular, 3-4 x 30-45 µm.

host plants

Ranunculaceae, narrowly monophagous

Ranunculus bulbosus, polyanthemos, repens.

In the literature before the revision by Kruse ao this species (mostly as E. ranunculi-repentis) was associated with a considerable number of other species; these associations are now in a need of reconsideration:

Ranunculus acris & subsp. friesianus, breyninus, cassubicus, crenatus, fallax, hyperboreus, lanuginosus, monophyllus, peltatus, polyanthemos subsp. nemorosus, sardous, trichophyllus, villosus subsp. constantinopolitanus.

synonyms

Entyloma ranunculi-repentis Sternon, 1925; E. wroblewskii Kochman, 1934.

references

Buhr (1965a), Dietrich (2013a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2019a), Kruse, Lutz, Piątek & Thines (2018), Kummer (2012a), Lutz & Vánky (2009a), Savchenko & Heluta (2012a), Scholz & Scholz (2013a), Vánky (1994a), Vánky & Abbasi (2013a), Woods, Chater, Smith ao (2018a).

mod 23.viii.2019