Farysia thuemenii (A.A. Fisch. Waldh.) Nannf.

Synonyms

Caeoma olivaceum (DC.) Schlecht.
Cintractia cariciphila (Speg.) Cif.
Cintractia caricis f. minor Camara & Oliveira
Elateromyces olivaceus (DC.) Bubák
Erysibe olivacea (DC.) Wallr.
Farysia caricis (DC.) Liro
Farysia olivacea (DC.) Syd. & P. Syd.
Uredo olivacea DC.
Uredo segetum ζ caricis DC.
Ustilago caricicola Tracy & Earle
Ustilago cariciphila Speg.
Ustilago olivacea (DC.) Tul. & C. Tul.
Ustilago thuemenii A.A. Fisch. Waldh.

Description

Sori in scattered flowers arising from the floral pedicels, initially as ovoid to cylindrical bodies, concealed by the utricle (perigynium), later protruding, covered by a greyish white to light brown fungal peridium that becomes shredded and exposes the olivaceous brown dusty spore mass traversed by numerous prominent hyphal fascicles, commonly extending beyond the sori.

Spores globose, subglobose (3–7 µm diam.), ovoid or elongate (3–12 µm long), often with truncate ends, or irregular, curved, pyriform or subtriangular, pale olivaceous brown; surface finely but distinctly verruculose; in SEM the warts truncate or rounded, very densely situated, sometimes confluent, c. 0.3 µm high.

Spore germination: the 4-celled basidium (of 3 + 1 type, 1 cell remaining in the spore) budding off several ovoid basidiospores.

Hosts
   
Host family: Cyperaceae
   
Host species: Carex longebrachiata Boeck.
Carex polyantha F.Muell.

Distribution

States & Territories: NSW, QLD