Ustilago davisii Liro, 1924

on Glyceria


Sori form long, dark parallel striae over the leaves, sometimes also the sheaths and culm; they contain a blackish-brown, powdery mass of spores. Spores 7-10 x 8-12 µm, smooth. The fungus is systemic; infected plants usually do not flower.

host plants

Poaceae, monophagous

Glyceria fluitans, maxima, notata.


the spores are appreciably larger than in the much more common U. filiformis.


Buhr (1964b), Klenke & Scholler (2015a), Kruse (2019a), Vánky (1994a).

mod 28.vii.2019