Ustanciosporium majus (Desmazières) Piepenbring, 2000

on Rhynchospora

gall

the anthers and ovaries are modified into a black mass of spores, still enclosed by the glumes. Spores 7.5-14.5 x 11-16.5 µm. The infection is systemic, infected plants are dwarfed, the shape of the flowers is abnormal.

hostplants

Cyperaceae, monophagous

Rhynchospora alba.

synonyms

Cintractia majoe (Desmazières) Liro, 1935; Ustilago intercedens Lehtola, 1942.

references

Buhr (1965a), Klenke & Scholler (2015a), Spooner & Leon (2006a), Vanderweyen & Fraiture (2014a), Vánky (1994a).

mod 28.vii.2018