Eragrostis speciosa

Eragrostis speciosa (Roem. &
Schult.) Steud. Syn. Pl. Glum. 1: 279 (1854).

Classification. (GPWG 2001) : Subfamily Chloridoideae. Cynodonteae.

Basionym and/or
Replacement Name:
 Poa speciosa
Roem. & Schult., Syst. Veg. 2: 573 (1817).

Type of Basionym or
Protologue Information
: LT: R. Brown 6273, 1802–1805, Australia:
"inter australiense".

Recent synonyms:
E. oldfieldii.

Key references
(books and floras):
[1878] G.Bentham, Flora Australiensis 7 (648),
[1952] C.A.Gardner, Flora of Western Australia 1 Gramineae (119
& as E. oldfieldii), [1981] M.Lazarides in J.Jessop (ed)., Flora
of Central Australia
(458), [2002] D.Sharp & B.K.Simon, AusGrass,
Grasses of Australia
, [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses
of South Australia
(381), [2008] S.W.L.Jacobs, R.D.B.Walley &
D.J.B.Wheeler, Grasses of New South Wales (257).

[1952] C.A.Gardner, Flora of Western Australia 1 Gramineae (120,
Pl. 34), [2005] K.Mallet (ed.), Flora of Australia 44B: Poaceae 3
(Fig. 65J-K), [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South
 (381, fig. 314), [2008]
S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales,
4th edn (257).

Perennial. Culms erect, stature slender to delicate, 15–140 cm tall. Ligule a
fringe of hairs, 0.3–0.6 mm long. Leaf-blades straight, flat or involute or
convolute, 15–25 cm long, 1–2 mm wide. Leaf-blade surface glabrous.

Inflorescence compound, a panicle or a panicle. Panicle linear or oblong, 7–47
cm long, 1.2–2.5 cm wide.

Spikelets sessile or pedicelled. Fertile spikelets many flowered, with at least
2 fertile florets (10–110(-145)), comprising 10–110(–145) fertile floret(s),
with diminished florets at the apex, linear or lanceolate, laterally
compressed, 4.5–50 mm long.

Glumes. Glumes
similar. Lower glume lanceolate, membranous, keeled, 1-keeled, 1 -nerved. Upper
glume lanceolate, 1.2–1.8 mm long, membranous, keeled, 1-keeled, 1 -nerved.

Fertile lemma 1.5–2 mm long, keeled, 3 -nerved. Lemma apex muticous. Lodicules
present. Anthers 2. Grain 0.5 mm long.

: Australasia.

: Western Australia, Northern Territory, South Australia,
Queensland, New South Wales.

Western Australia: Gardner, Dampier.
Fortescue, Austin. Northern Territory: Darwin & Gulf, Victoria River,
Barkly Tableland, Central Australia North, Central
Australia South. South Australia:
Lake Eyre. Queensland: Burke, Cook, Gregory
North, Leichhardt, Maranoa, Mitchell, North Kennedy, South Kennedy, Warrego,
Gregory South. New South Wales:
North-Western Plains.

Distinguishing characters include relatively short, blunt palea with emarginate
apex, short keels and narrow flaps; anthers two; glumes partly scaberulous;
leaden spikelets with numerous closely imbricate florets and straight rachilla;
slender flaccid panicle; plant mostly glabrous and smooth, highly coloured,
with mealy scabrous filiform blades and ciliate ligule.

distribution is from northern and central Australia from around the Dampier
Penin. and Port Hedland in W.A. across to about Mackay on the E coast of Qld. S
to Wee Waa in northern N.S.W. Commonly in seasonally wet habitats (beds,
frontages and levees of watercourses, floodouts, seepage slopes, margins of
swamps and springs) with sandy alluvial soils; also in lateritic, calcareous
and saline soils and moist disturbed ground.; flowers all year round but not recorded
for Nov.; fruits all year round but not recorded for Nov.

AVH 2011



Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith