Ustilago davisii Liro, 1924

on Glyceria

gall

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.

notes

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

references

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

mod 28.vii.2019