Tilletia whiteochloae R.G. Shivas & Vánky

Description

Sori in some ovaries of an inflorescence, obovoid, with a narrow basal part, 2–5 mm long, 1.5–2.0 mm wide, initially green, later brown, at maturity rupturing longitudinally exposing the black powdery mass of spores mixed with sterile cells.

Spores globose, subglobose to broadly ellipsoidal, 20–28 × 18–24 (–26) µm, yellowish to dark reddish brown; wall 2.5–3.5 µm thick, including the irregular blunt or subacute 2–3 µm high verrucae that, in surface view, appear as dark polygonal areas 9–15 per spore diameter.

Sterile cells globose, ellipsoidal to slightly irregular, 15–40 (–55) µm long, subhyaline to yellowish brown; wall 2–3 µm thick, smooth, sometimes finely punctate.

Hosts
   
Host family: Poaceae
   
Host species: Whiteochloa capillipes (Benth.) Lazarides
Whiteochloa cymbiformis (Hughes) B.K.Simon
Whiteochloa multiciliata Lazarides
Whiteochloa semitonsa (F.Muell. ex Benth.) C.E.Hubb.

Distribution

States & Territories: NT, WA

Comments

The spores of T. whiteochloae on Whiteochloa multiciliata are smaller (16–26 µm) than those on other hosts.