Description: Wiry, often almost shrubby perennials with contracted or loose rhizomes with extravaginal innovations.
Spikelets sessile or very shortly pedicellate in a simple spike or in a scarcely branched spike-like panicle, 3-flowered, the lower 2 sterile and reduced to empty lemmas, the terminal bisexual. Rachis disarticulating above the glumes, the 3 lemmas falling as a whole. Lodicules 2, large, hyaline. Stamens 4. Styles short, distinct.
Distribution and occurrence: World: 6 species, endemic Australia. Australia: all States except N.Terr.
Text by S. W. L. Jacobs & S. M. Hastings
Taxon concept:
Taxa not yet included in identification key
Tetrarrhena acuminata
| | Key to the species | |
| 1 | Culms and leaves subsmooth to rough; blades flat | Tetrarrhena juncea |
| Culms and leaves smooth; blades tightly encircling culm | Tetrarrhena turfosa |
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