Anthracocystis bothriochloae (L. Ling) McTaggart & R.G. Shivas

Synonyms

Sorosporium bothriochloae L. Ling
Sporisorium bothriochloae (L. Ling) Vánky

Description

Sori in some ovaries of an inflorescence, long-cylindrical or fusiform, tapering at both ends, 5–13 mm long, 1–2 mm wide, protruding beyond the glumes, covered by a pale yellowish brown rather tough peridium that dehisces from its apex exposing a blackish brown granular mass of spore balls surrounding 1 or 2 simple tapering sometimes branched columellae.

Spore balls rather permanent, ellipsoidal to usually irregular, polyhedral, oblong, fusiform or even bent, 40–180 (–200) × 30–100 (–120) µm, yellowish to reddish brown; larger balls subopaque, composed of tens or hundreds of spores that separate by pressure.

Spores slightly dimorphic, globose, subglobose, ellipsoidal or subpolyhedrally slightly irregular, 10.0–14.5 × 8–13 µm, yellowish brown. Inner spores of larger balls paler; wall uniformly c. 0.5 µm thick, apparently smooth to finely punctate. Outer spores darker; wall even or slightly uneven, 0.5–0.8 µm thick, finely densely verrucose-echinulate; spore profile smooth, delicately wavy or very finely serrulate on the free surface of the outer spores.

Sterile cells absent.

Hosts
   
Host family: Poaceae
   
Host species: Dichanthium fecundum S.T.Blake
Dichanthium sericeum subsp. polystachyum (Benth.) B.K.Simon

Distribution

States & Territories: NT, WA

Comments

Anthracocystis bothriochloae differs from other smuts on Dichanthium and Bothriochloa by producing cylindrical sori with columellae in some ovaries in the inflorescence (Vánky, 2004).