Aristida australis B.K.Simon. Austrobaileya
2: 88 (1984).
Classification. (GPWG 2001) : Subfamily
Type of Basionym or
Protologue Information: Australia: South Australia: Southern
Adelaide Plains near Queenstown, 8 May 1967, T. Smith s.n. (HT:
AD-96737133(photo, BRI); IT: BRI-279005).
(books and floras):  D.Sharp & B.K.Simon, AusGrass,
Australia,  J.Jessop, G.R.M.Dashorst, F.M.James, Grasses
 K.Mallet (ed.), Flora of Australia 44B: Poaceae 3
20H-J),  J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South
Australia (319, fig. 250).
of the south.
Perennial. Culms 30–65 cm tall, 3–4 -noded. Mid-culm internodes
Lateral branches branched. Ligule a fringe of hairs, 0.2 mm long.
flexuous, flat, 5–10 cm long, 2–3 mm wide.
Inflorescence compound, a panicle. Panicle linear, 8–24 cm long, 0.2–0.3
Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, lanceolate, terete, 13 mm long.
similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
keeled, 1-keeled, 1–3 -nerved. Lower glume apex awned. Upper glume
13 mm long, membranous, keeled, 1-keeled, 1 -nerved. Upper glume apex
Fertile lemma 9–10 mm long, without keel, 3 -nerved. Lemma apex awned, 3
-awned. Median (principal) awn without a column. Lateral lemma awns
Palea without keels. Anthers 3.
Distribution: South Australia.
A. australis is very similar to A. arida and A.
with the exception of its completely smooth or very sparsely scaberulous
lemmas. These three species are sympatric and are probably closely
to three localised regions of South Australia. Sandy soil. Flowering and
fruiting February, May, August and September.