Lachnagrostis scabra

Lachnagrostis scabra (P.Beauv)
Nees ex. Steud. Nomencl.
2nd edn 1: 250 (1840).

Classification. (GPWG 2001) : Subfamily Pooideae.
Tribe Poeae.

Basionym and/or
Replacement Name:
 Agrostis rudis
Roem. & Schult., Syst. Veg. 2: 360 (1817).

Type of Basionym or
Protologue Information
: HT: R. Brown s.n., Without locality (BM).

Recent synonyms: Agrostis rudis Roem.& Schult.

Key references
(books and floras):
[1810]. R.Brown, Prodromus (171 as Agrostis
), [1878] G.Bentham, Flora Australiensis 7 (583 as ?Deyeuxia
), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of Australia
(as L. rudis), [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of
South Australia
(2332), [2008] S.W.L.Jacobs, R.D.B.Walley &
D.J.B.Wheeler, Grasses of New South Wales (290), [2009] A.Wilson (ed.). Flora
of Australia
Vol 44A. Poaceae 2 (189 as subsp. scabra, 190 as subsp.

[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia  (233, fig. 178 as L. scabra), [2008]
S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales,
4th edn (290).

Habit. Annual.
Culms erect or geniculately ascending, 60–80 cm tall, 3–4 -noded. Leaf-sheaths
antrorsely scabrous. Ligule an eciliate membrane, 1–4 mm long, lacerate,
obtuse. Leaf-blades linear, flat, 10–17 cm long, 3.5–5 mm wide. Leaf-blade
surface scabrous.

Inflorescence compound, a panicle. Panicle pyramidal, 12–25 cm long.

Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), with a barren rachilla extension, lanceolate, laterally compressed,
1.8–3 mm long.

Glumes. Glumes
similar, firmer than fertile lemma. Lower glume lanceolate, membranous, keeled,
1-keeled, 1 -nerved. Upper glume lanceolate, 2 mm long, membranous, keeled,
1-keeled, 1 -nerved. Upper glume surface scabrous.

Fertile lemma 1.5–2.3 mm long, without keel, 5 -nerved. Lemma surface glabrous.
Lemma apex dentate, awned, 1 -awned. Median (principal) awn subapical, 0.5–2 mm
long overall. Palea present. Lodicules present. Anthers 3.

: Australasia.

: South Australia, Victoria, Tasmania.

South Australia: South-eastern. Victoria: Gippsland Plain, Otway Plain, Otway Range,
Promontory, Wannon. Tasmania: Central Highlands,
Midlands, East Coast, South West, Mt Field.

Notes. Endemic. In Tas.,
rare in Vic. from a few coastal sites, and S.A. In damp areas on margins of
forest from sea level to 1200 m altitude.

subsp. scabra, subsp. curviseta.

Lemma awnless or with
a fine straight awn 0.1–0.7 mm long             L. scabra subsp. scabra

Lemma awn 1–1.4 mm
long, curved to geniculate, occasionally absent L. sacbra subsp. curviseta

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