Anthracocystis enteromorpha (McAlpine) McTaggart & R.G. Shivas

Synonyms

Sorosporium enteromorphum (McAlpine) McAlpine
Sporisorium enteromorphum (McAlpine) Vánky
Ustilago enteromorpha McAlpine

Description

Sori occupying the central spikelets, the racemes (intestine-shaped, 12–25 mm long and 1–2 mm wide) or the entire inflorescence (long-linear or flagelliform, 50–110 mm long and 2–3 mm wide), at first covered by a greyish brown peridium that disintegrates exposing a dark brown granular-powdery mass of spore balls mixed with groups of sterile cells and several filiform columellae.

Spore balls subglobose, oblong or irregular, 25–60 (–80) × 20–45 µm, many-spored, disintegrating at maturity.

Spores subglobose, ovoid to slightly irregular, 5.5–8.0 × 5–7 µm, yellowish brown; wall uniformly c. 0.5 µm thick, finely punctate-verrucose.

Sterile cells somewhat larger than the spores, 8–12 µm long, in short chains or irregular groups, subhyaline, collapsed in old specimens.

Hosts
   
Host family: Poaceae
   
Host species: Themeda triandra Forssk.

Distribution

States & Territories: NSW, QLD, TAS, VIC

Comments

Anthracocystis enteromorpha and A. langdonii have similar sori with filiform columellae that occupy the entire inflorescence of infected hosts in Themeda. However, the former has only been found on T. triandra and has smaller spores than A. langdonii which infects T. avenacea (in Australia) and T. novoguineensis (in Papua New Guinea).