Tranzscheliella hypodytes (Schltdl.) Vánky & McKenzie

Synonyms

Caeoma hypodytes Schltdl.
Cintractia hypodytes (Schltdl.) Maire
Erysibe hypodytes (Schltdl.) Wallr.
Uredo hypodytes (Schltdl.) Desm.
Ustilago agrestis Syd.
Ustilago athenae Maire
Ustilago bromi-erecti Cif.
Ustilago funalis Ellis & Everh.
Ustilago hypodytes (Schltdl.) Fri.
Ustilago hypodytes var. lolii Thüm.
Ustilago nummularia Speg.
Ustilago spegazzinii Hirschh.
Ustilago spegazzinii var. agrestis (Syd.) G.W. Fisch. & Hirschh.
Ustilago sporoboli Ellis & Everh.
Ustilago stipicola Speg.
Ustilago sumnevicziana Lavrov

Description

Sori in culms, as a blackish brown semi-agglutinated to powdery spore mass surrounding the upper internodes (sometimes extending from the basal part of the internode to the next node) and occasionally in the axis of an abortive inflorescence. Sori at first protected by the leaf sheath, finally ±naked; upper internodes and leaves of host usually stunted. Infection systemic; inflorescences usually abortive.

Spores globose, subglobose to ovoid, occasionally elongate, irregular or slightly compressed, 4–6 (–7) × 3.5–5.5 µm, medium to dark olivaceous brown; wall smooth, c. 0.5 µm thick, usually with an inconspicuous hyaline and smooth or finely punctate-verruculose cap at the poles; in SEM the entire surface densely and minutely verruculose.

Spore germination resulting in slender septate (3- or 4-celled, 4-nucleate) basidia developing lateral branches that are themselves branched, septate and uninucleate, these producing clumps of aerial sporidia on nutrient media.

Hosts
   
Host family: Poaceae
   
Host species: Austrostipa aristiglumis (F.Muell.) S.W.L.Jacobs & J.Everett
Austrostipa crinita (Gaudich.) S.W.L.Jacobs & J.Everett
Austrostipa densiflora (Hughes) S.W.L.Jacobs & J.Everett
Austrostipa flavescens (Labill.) S.W.L.Jacobs & J.Everett
Austrostipa setacea (R.Br.) S.W.L.Jacobs & J.Everett
Austrostipa sp.
Austrostipa sp. aff. blackii (C.E.Hubb.) S.W.L.Jacobs & J.Everett
Dichelachne crinita (L.f.) Hook.f.

Distribution

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