Sporisorium andrewmitchellii R.G. Shivas & Vánky

Description

Sori in the basal leaf sheaths of the uppermost congested leaves in the shoot apex, all shoots on an infected plant affected, oval to fusiform, 10-20 x 2-6 mm, hidden by the leaf sheaths at first, subtended by remnants or intact leaf blades, covered by a yellowish peridium of host and fungal origin that flakes away to expose several (>20) filamentous columellae and blackish mass of spores balls.

Spore balls persistent, subglobose, ellipsoidal to irregular, 70-120 x 40-90 µm, reddish brown, composed of numerous (often > 100) spores.

Spores subglobose to ellipsoidal, 8-14 x 8-12 µm, reddish brown, outer spores darker and more densely verruculose-echinulate than the inner spores, wall even 0.5-1 µm.

Sterile cells absent.

Hosts
   
Host family: Poaceae
   
Host species: Enneapogon sp. aff. lindleyanus (Domin) C.E. Hubb.

Distribution

States & Territories: WA