Abstract
Whilst working on a revision of the Australian species of Stipa I noticed that several undetermined specimens were only superficially similar to species of Stipa and decided that they would best be treated as a new species in a new genus. This new species is a hummock-forming perennial with Kranz leaf anatomy similar to the 'hard' type (Jacobs 1971; Carolin, Jacobs & Vesk 1973) found in both Triodia and Plectrachne; the awn is almost circular in transsection, consisting of an outer complete layer of unevenly thickened fibres (thickest on the outer tangential wall) with an inner tissue of parenchymatous cells containing a central vascular bundle, quite unlike the awn anatomy of Stipa with its flattened awn (in trans-section) and two lateral cylinders of chlorenchyma (Duval-Jouve 1871). Although its relationships are clearly with Triodia and Plectrachne this new taxon differs from both in the single bisexual floret per spikelet and in the long, single, terminal awn on the lemma.
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