Plant Parasites of Europe

leafminers, galls and fungi

Ustanciosporium majus

Ustanciosporium majus (Desmazières) Piepenbring, 2000

on Rhynchospora


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.

host plants

Cyperaceae, monophagous

Rhynchospora alba.


Cintractia major (Desmazières) Liro, 1935; Ustilago intercedens Lehtola, 1942; U. montagnei var. major Desmazières, 1851.


Brandenburger (1985a: 684), Buhr (1965a), Denchev, Martín, Kemler & Denchev (2021a), Klenke & Scholler (2015a), Spooner & Leon (2006a), Vanderweyen & Fraiture (2014a), Vánky (1994a).

Last modified 18.xii.2022