Anthracocystis langdonii (Vánky) McTaggart & R.G. Shivas

Synonyms

Sporisorium horsfallii Vánky

Description

Sori occupying the entire inflorescence, partly hidden by the spathae, c. 30–60 mm long and 5 mm wide, at first covered by a thin greyish peridium that disintegrates revealing a dark brown powdery mass of spores mixed with sterile cells and numerous long filiform columellae of host origin.

Spores when young in large irregular many-spored balls, when mature solitary, globose, subglobose, ovoid to elongate, (7–) 8–11 (–12) × 7–9 µm, olivaceous brown; wall uniformly c. 1 µm thick, finely and moderately densely punctate-verruculose.

Sterile cells solitary, globose, subglobose, ovoid, often collapsed, variable in size, usually larger than the spores, 8–18 µm long, subhyaline to pale yellowish brown; wall 1.0–1.5 µm thick, smooth.

Hosts
   
Host family: Poaceae
   
Host species: Themeda avenacea (F.Muell.) Maiden & Betche
Themeda novoguineensis (Reeder) Jansen

Distribution

States & Territories: NT, QLD

Comments

See comments under A. enteromorpha.