Cintractia lipocarphae Vánky, C. Vánky & R.G. Shivas

Description

Sori in different parts of the host plant, usually restricted to 1 or several heads (spikes) of an inflorescence (occasionally only part of a head is affected), naked, globose, 1–2 mm diam., black, compact with a powdery surface; sometimes developing in the basal parts of stems, forming fusiform swellings 3–15 mm long and 1.0–1.5 mm wide, covered initially by remnants of green host tissues and whitish fungal elements. In the spikes, sori initially developing in the floral axis, eventually destroying the flowers. Immature sori covered by a thin whitish or pale brown peridium formed of host and fungal tissues, also hidden by the many bracts in a head.

Spores globose or subglobose, rarely broadly ellipsoidal, 11–16 (–17) × (10–) 11–15 (–16) µm, laterally compressed (8.0–10.5 µm wide), yellowish brown; wall c. 0.8 µm thick, thinner on the flattened sides, finely and densely punctate to verruculose; spore profile smooth to rough.

Hosts
   
Host family: Cyperaceae
   
Host species: Bulbostylis barbata (Rottb.) C.B.Clarke
Cyperus squarrosus L.
Lipocarpha microcephala (R.Br.) Kunth

Distribution

States & Territories: NT

Comments

It is curious that C. lipocarphae is known from only one locality in the Northern Territory where it occurs on three genera of sedges, Bulbostylis, Cyperus and Lipocarpha. Further collections of C. lipocarphae are required to determine its complete host range and distribution.