Shivasia solida (Berk.) Vánky, M. Lutz & M. Piątek

Synonyms

Cintractia solida (Berk.) M. Piepenbr.
Sorosporium solidum (Berk.) McAlpine
Tolyposporium solidum (Berk.) Vánky
Urocystis solida (Berk.) E. Fisch.
Ustilago solida Berk.

Description

Sori in all flowers of an inflorescence, comprising the innermost floral organs, visible between the glumes as black, globose to ovoid bodies, 1-2 mm diam., rarely also on the stems, then fusiform, at first covered by a thick, whitish brown fungal peridium of thick-walled sterile hyphae that early flakes away exposing the compact mass of spores and spore balls with spores, powdery on the surface.

Spore balls usually irregular or globoid to ellipsoidal, composed of 2–15 spores, loose but rather permanent, 25–55 (–70) × 20–40 µm, reddish brown, enclosed by subhyaline mucilaginous layer.

Spores subglobose, ovoid, elongate or irregular, flattened on one or two sides, 15–20 × 12–16 µm, yellowish to pale reddish brown; wall uneven, 0.5–1.5 µm thick, smooth to rough, in SEM finely, densely, irregularly verruculose and covered by remnants of the mucilaginous layer which form irrgularly warty (pseudo-) ornamentation.

Spore balls and spores produced on the surface of host tissues in haline, sporogenous fungal layer within radially arranged, U-shaped pockets.

Spore germination results in long, aseptate basidia on which apically elongated, cylindrical basidiospores are produced that germinate by filaments.

Hosts
   
Host family: Cyperaceae
   
Host species: Schoenus apogon Roem. & Schult.
Schoenus calyptratus Kuk.
Schoenus latelaminatus Kük.
Schoenus nanus (Lehm.) Benth.
Schoenus nitens (R.Br.) Poir. ex Roem. & Schult.
Schoenus tesquorum J.M.Black

Distribution

States & Territories: ACT, NSW, SA, TAS, VIC