Eragrostis pergracilis S. T. Blake. Proc.
Roy. Soc. Queensland
59: 154 (1948).
Classification. (GPWG 2001) : Subfamily
Type of Basionym or
Protologue Information: HT: S.T. Blake 14084, 22 May 1939, Australia: Queensland: Warrego Dist.: Dynever Downs, in
mulga scrub on reddish very silty loam, about 500 ft (BRI; IT: L, US-2959129).
(books and floras):  M.Lazarides in J.Jessop (ed)., Flora of
Central Australia (459),  D.Sharp & B.K.Simon, AusGrass,
Grasses of Australia,  J.Jessop, G.R.M.Dashorst, F.M.James, Grasses
of South Australia (378),  S.W.L.Jacobs, R.D.B.Walley &
D.J.B.Wheeler, Grasses of New South Wales (255).
 K.Mallet (ed.), Flora of Australia 44B: Poaceae 3
(Fig. 63A-B),  J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South
Australia (378, fig. 311), 
S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales,
4th edn (255).
or perennial. Culms erect or decumbent or prostrate, stature slender to
delicate, 3–45 cm tall, 2–3 -noded. Lateral branches simple. Leaf-sheaths
glabrous on surface. Ligule a fringe of hairs, 0.2–0.6 mm long. Leaf-blades
straight, filiform, involute, 1–5 cm long, 1–1.5 mm wide. Leaf-blade surface
Inflorescence compound, a panicle of racemes. Panicle ovate, dense or loose,
3–12 cm long, 2–6 cm wide.
Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets (12–73), comprising 12–73 fertile floret(s), with diminished florets at
the apex, linear, laterally compressed or terete, 8.5–45 mm long.
similar. Lower glume ovate, membranous, without keels or keeled, 1-keeled, 1
-nerved. Upper glume ovate, 1–1.4 mm long, membranous, without keels or keeled,
1-keeled, 1 -nerved.
Fertile lemma 1.5–2 mm long, keeled, 3 -nerved. Lemma apex entire or erose,
muticous. Lodicules present. Anthers 3. Grain 0.45–0.55 mm long.
Distribution: Western Australia, Northern Territory, South Australia,
Queensland, New South Wales, Victoria.
Western Australia: Canning,
Fortescue, Carnarvon, Austin. Northern Territory:
Central Australia South. South
Australia: North-western, Lake Eyre, Gairdner-Torrens Basin,
Gregory North, Maranoa, Warrego, Gregory South. New South Wales: North-Western
Introduced to England
by way of wool shoddy.
Distinguishing characters include filiform culms,
leaves and spikelets; tight, short, leaf-sheaths abruptly wider than blades;
ciliate ligule; terete often curved closely flowered spikelets, with straight
flattened rachilla; smooth, often 2-lobed lemmas, with the lateral nerves
midway or closer to midnerve; hyaline paleas with mostly smooth keels and flaps
much narrower than body; dorsally flattened caryopsis.
Endemic; distribution is from near Meekatharra, W.A.,
across central Australia to about Charleville, Qld, then scattered S to
Balranald, N.S.W., Avon Plains Swamps Wildlife Reserve, NW Vic.; introduced in
England. On plains, stony tablelands, brackish lakes, and saline flats; in red,
brown or grey sands, sandy loams and clays, often in run-on areas; also on
river frontages, claypans, roadsides and in streamlines.; flowers all year
round but not recorded in Nov.; fruits all year round but not recorded in Nov.