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Eragrostis concinna

Eragrostis concinna (R.Br.) Steud. Syn.
Pl. Gram.
1: 279 (1854).

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

Basionym and/or
Replacement Name:
 Poa concinna
R. Br., Prodr. 180 (1810).

Type of Basionym or
Protologue Information
: Australia:
Port Jackson: Hunter's River vel Coal
River: inclusis ripis
aestuarii.,.

Recent synonyms:
E. bella.

Key references
(books and floras):
[1810]. R.Brown, Prodromus (180 as Poa
concinna
), [1878] G.Bentham, Flora Australiensis 7 (647), [2002]
D.Sharp & B.K.Simon, AusGrass, Grasses of Australia.

Illustrations:
[1952] C.A.Gardner, Flora of Western Australia
1 Gramineae (125, Pl. 36), [2005] K.Mallet (ed.), Flora of Australia 44B:
Poaceae 3 (Fig. 71L-M).

Habit.
Perennial. Culms erect, 30–120 cm tall. Leaves mostly basal. Leaf-sheaths
glabrous on surface. Ligule a fringe of hairs, 0.3 mm long. Leaf-blades
straight, flat or conduplicate or convolute, 6–20 cm long, 1–5 mm wide.

Inflorescence.
Inflorescence compound, a panicle. Panicle lanceolate or ovate, 15–37 cm long.

Spikelets.
Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets (18–63), comprising 18–63 fertile floret(s), with diminished florets at
the apex, linear or lanceolate or oblong, laterally compressed, 12–35 mm long.

Glumes. Glumes
similar. Lower glume lanceolate, membranous, keeled, 1-keeled, 1 -nerved. Upper
glume lanceolate, 2–3 mm long, membranous, keeled, 1-keeled, 1 -nerved.

Florets.
Fertile lemma 2.6–3.4 mm long, keeled, 3 -nerved. Lemma apex muticous.
Lodicules present. Anthers 3. Grain 0.5 mm long.

Continental
Distribution
: Australasia.

Australian
Distribution
: Northern Territory, Queensland.

Northern
Territory
: Darwin & Gulf, Central Australia North, Central Australia South. Queensland: Burke, Cook, North
Kennedy.

Notes.
Distinguishing characters include glabrous, smooth, pruinose facies; short
palea relative to lemma, with unevenly scaberulous, thickened or winged keels;
globose or scarcely compressed often reticulate caryopsis; tightly imbricate
florets; thickened, semi-persistent rachilla; large sparse terminal panicles;
axillary panicles sometimes present; flattened spikelets, sometimes
cleistogamous.

Endemic;
occurs in N.T. on Melville Island and E of Darwin, also from near Burketown in
the Gulf of Carpentaria E to Laura in northern Qld. Seasonally wet habitats
such as floodplains, the margins of swamps and lagoons, drainage lines and
broad shallow depressions; in sandy yellow podsolics, gilgaied clayey loams and
sandy lateritic soils.; flowers Feb. and Apr.-Aug.; fruits Feb. and Apr.-Aug.

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