Ectrosia agrostoides

Ectrosia agrostoides Benth. Fl.
7: 634 (1878).

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

Type of Basionym or
Protologue Information
: ST: Armstrong s.n., Australia: N. Australia,
Port Essington

ST: Drummond s.n.,
Australia: W. Australia (K).

Key references
(books and floras):
[1878] G.Bentham, Flora Australiensis 7 (634),
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of Australia.

[2005] K.Mallet (ed.), Flora of Australia 44B: Poaceae 3 (Fig.

Habit. Annual.
Culms erect or geniculately ascending, stature slender to delicate, 9–40 cm
tall, 1–3 -noded. Mid-culm internodes glabrous. Lateral branches sparsely
branched. Leaf-sheaths glabrous on surface or hairy. Ligule a fringe of hairs.
Leaf-blades erect, filiform, convolute, 1–9 cm long, 0.2–2 mm wide. Leaf-blade
surface scaberulous, glabrous or indumented.

Inflorescence compound, a panicle. Panicle linear or lanceolate, loose, 2–12 cm
long, 0.5–2.2 cm wide.

Spikelets pedicelled. Fertile spikelets 1 or more flowered, with 1 fertile
floret, comprising 1 fertile floret(s), with diminished florets at the apex,
linear or lanceolate, laterally compressed, 2–3 mm long.

Glumes. Glumes
similar. Lower glume lanceolate, membranous, keeled, 1-keeled, 1 -nerved. Upper
glume lanceolate, 1–2 mm long, membranous, keeled, 1-keeled, 1 -nerved.

Fertile lemma 1–2 mm long, keeled, 3 -nerved. Lemma surface glabrous. Lemma
apex entire or dentate or lobed, mucronate or awned, 1 -awned. Median
(principal) awn 0.2–1 mm long overall. Palea 2 -nerved. Anthers 3. Grain 0.6 mm

: Australasia and Pacific.

: Western Australia, Northern Territory, Queensland.

Western Australia:
Gardner. Northern Territory: Darwin & Gulf. Queensland: Cook,
North Kennedy.

Endemic; occurs in the Kimberley, W.A., the northern part of the N.T. and on
the E coasts and offshore islands of the N.T. and Qld. Also on Aru Is. in the
Moluccas. Known from shallower sandy soils, with Melaleuca, Casuarina or
Eucalyptus, and other grasses.

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