Austrostipa nullanulla (J.Everett &
S.W.L.Jacobs) S.W.L.Jacobs & J.Everett. Telopea 6: 587 (1996).
Classification. (GPWG 2001) : Subfamily Pooideae. Tribe Stipeae.
Basionym and/or
Replacement Name: Stipa
nullanulla J. Everett & S.W.L. Jacobs, Telopea 2(4): 398 (1983).
Type of Basionym or
Protologue Information: New South Wales: Nulla Nulla, 2 km S of gate at
northern end of Bluff paddock, saltbush. mallee, Myoporum sp., 25 Nov 1980, J.
Everett & S.W.L. Jacobs 133 (HT: NSW; IT: AD)
Key references
(books and floras): [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
Australia, [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South
Australia (84), [2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses
of New South Wales (156), [2009] A.Wilson (ed.). Flora of Australia,
Vol 44A. Poaceae 2 (27).
Illustrations:
[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia (85, Fig. 46), [2008] S.W.L.Jacobs,
R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales, 4th edn
(156), [2009]. A.Wilson (ed.), Flora of Australia 44A: Poaceae 2
(55, Fig 8).
Habit.
Perennial. Culms erect, 40–50 cm tall, 1–2 mm diam., 2 -noded. Mid-culm
internodes glabrous or pubescent. Mid-culm nodes glabrous. Lateral branches
simple. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane, 1–5(–10)
mm long, membranous, lacerate. Leaf-blades flat or involute, 15–20 cm long, 2–3
mm wide. Leaf-blade surface scaberulous, indumented.
Inflorescence.
Inflorescence compound, a panicle. Panicle ovate, 13–19 cm long.
Spikelets.
Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension, linear, terete, 9–11 mm long.
Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, membranous,
without keels, 3 -nerved. Upper glume lanceolate, 8–10 mm long, membranous,
without keels, 5 -nerved.
Florets.
Fertile lemma 5–6 mm long, without keel, 5 -nerved. Lemma surface glabrous.
Lemma apex entire, awned, 1 -awned. Median (principal) awn 50–70 mm long overall,
with a twisted column. Column 18–25 mm long. Palea 2 -nerved, without keels.
Lodicules present. Anthers 3. Grain 2.7–3 mm long.
Continental
Distribution: Australasia.
Australian
Distribution: South Australia, New South Wales, Victoria.
South Australia:
North-western, Eyre Peninsula, Murray. New South Wales: South Far
Western Plains. Victoria: Murray Mallee.
Notes. South Far Western
Plains of New South Wales, Victoria and west into South Australia.
