Ustilago grandis Fries, 1832

reed smut

on Phragmites

Ustilago grandis on Phragmites australis

Phragmites australis, France, dép. Moselle, Étang de Lindre, 11.v.2018 © Stéphane Claerebout

Ustilago grandis on Phragmites australis

spore mass


Dark brown sori on the stems, sometimes covering the entire stem from one internodium to the other (then resembling a slender Typha inflorescence, writes Buhr). Initially covered by the epidermis of the host plant. Spores 7-10 x 8-11 μ; they are finely echinulate, but that is not visible with the light microscope.

host plants

Poaceae, monophagous

Phragmites australis.


Ainsworth & Sampson (1950a), Almaraz (1998a), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Ellis & Ellis (1997a), Klenke & Scholler (2015a), Kruse, Thiel, Beenken ao (2018d), Redfern & Shirley (2011a), Riegler-Hager (2005a), Roskam (2009a), Savchenko & Heluta (2012a), Scholler & Schubert (1993a), Van Ryckegem (2005a), Vanderweyen & Fraiture (2014a), Tomasi (2014a), Woods, Chater, Smith ao (2018a).

mod 1.ix.2019