Anthracocystis mixta (Massee) McTaggart & R.G. Shivas

Synonyms

Sorosporium eriochloae Griffiths
Sorosporium mixtum (Massee) McAlpine
Sporisorium mixtum (Massee) Vánky
Tilletia mixta Massee

Description

Sori in all spikelets of an inflorescence, destroying the inner floral organs, cylindrical to subfusiform, c. 2–6 mm long, 1.0–1.5 mm wide, partly hidden by the glumes, covered by a pale brown peridium that ruptures irregularly exposing the blackish brown granular-powdery mass of spore balls and 1 (–3) stout central columellae c. the length of the sorus, often with short branches on their distal part.

Spore balls subglobose, ellipsoidal, elongate or irregular, 35–80 (–100) × 30–55 µm, reddish brown, composed of numerous (20–50 or more?) readily separating spores.

Spores subglobose, ellipsoidal to subpolyhedrally irregular, 9.5–15.0 (–16.5) × 8–13 µm, yellowish to reddish brown; wall uniformly 0.8–1.0 µm thick, densely, rather regularly verrucose-echinulate; spore profile finely serrulate.

Sterile cells not seen between the spore balls.

Hosts
   
Host family: Poaceae
   
Host species: Eriochloa australiensis Stapf ex Thell.
Eriochloa procera (Retz.) C.E.Hubb.
Eriochloa pseudoacrotricha (Stapf ex Thell.) J.M.Black

Distribution

States & Territories: NSW, NT

Comments

McAlpine (1910: 179) reported this smut on Eriochloa punctata (L.) Desv. ex Hamilton, a species that is native to Central America but which does not occur in Australia.