Lachnagrostis plebeia (R.Br.)Trin. (1820).
Classification. (GPWG 2001) : Subfamily Pooideae. Tribe Poeae.
Basionym and/or
Replacement Name: Agrostis
plebeia R. Br., Prodr. 1: 172 (1810).
Type of Basionym or
Protologue Information: HT: R. Brown 6220, Australia: New South Wales: Port Jackson (BM). Vickery,
Contr. New South Wales
Natl. Herb. 1: 101–119, notes that this is the only specimen of this
species not from Western Australia,
and this probably indicates a problem with the locality data on the type
specimen.
Key references
(books and floras): [1810]. R.Brown, Prodromus (172 as Agrostis
plebeia), [1878] G.Bentham, Flora Australiensis 7 (580 as Deyeuxia
plebeia), [1952] C.A.Gardner, Flora of Western Australia 1 Gramineae
(as Agrostis plebeia), [2002] J.Wheeler, N.Marchant & M.Lewington,
Flora of the South West (395), [2005] K.Mallet (ed.), Flora of Australia 44B:
Poaceae 3, [2009] A.Wilson (ed.). Flora of Australia, Vol 44A. Poaceae 2
(186).
Habit. Annual.
Culms stature slender to delicate, 20–30 cm tall, 3 -noded. Leaf-sheaths
glabrous on surface. Ligule an eciliate membrane, 2–3 mm long, obtuse.
Leaf-blades filiform or linear, flat or involute or convolute, 2–7 cm long,
0.5–1 mm wide.
Inflorescence.
Inflorescence compound, a panicle. Panicle linear, 4–12 cm long.
Spikelets.
Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), without rachilla extension or with a barren rachilla extension,
elliptic, laterally compressed, 3–4 mm long.
Glumes. Glumes
similar, firmer than fertile lemma, shiny. Lower glume lanceolate, membranous,
keeled, 1-keeled, 1 -nerved. Upper glume lanceolate, 3–3.7 mm long, membranous,
keeled, 1-keeled, 1 -nerved.
Florets.
Fertile lemma 3–3.5 mm long, without keel, 5 -nerved. Lemma surface indumented.
Lemma apex dentate, awned, 1 -awned. Median (principal) awn dorsal, 6–8 mm long
overall, with a twisted column. Palea present. Lodicules present. Anthers 2–3.
Continental
Distribution: Australasia.
Australian
Distribution: Western Australia.
Western Australia: Drummond, Dale.
Notes.
Endemic. Restricted to
W.A.
