Deyeuxia scaberula Vickery. Contr. New South Wales Natl.
Herb. 1: 64 (1940).
Classification. (GPWG 2001) : Subfamily Pooideae.
Tribe Poeae.
Type of Basionym or
Protologue Information: IT: R.C. Gunn s.n., Australia: Tasmania (L).
Recent synonyms:
D. benthamiana.
Key references
(books and floras): [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
Australia,
[2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses of New South
Wales (200 as D. benthamiana & 206), [2009] A.Wilson (ed.). Flora
of Australia,
Vol 44A. Poaceae 2 (204).
Illustrations:
[2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South
Wales, 4th edn (206 and 200 as D. benthamiana), [2009]. A.Wilson
(ed.), Flora of Australia
44A: Poaceae 2 (205, Fig.28).
Habit.
Perennial. Culms erect, stature slender to delicate, 60–90 cm tall, 3–4 -noded.
Mid-culm internodes glabrous. Mid-culm nodes glabrous. Leaves mostly basal.
Leaf-sheaths scaberulous. Ligule an eciliate membrane, 2–3 mm long, membranous,
abaxially hairy, lacerate, truncate. Leaf-blades linear, flat, 5–20 cm long,
1.5–5 mm wide. Leaf-blade surface scabrous, glabrous or indumented.
Inflorescence.
Inflorescence compound, a panicle. Panicle 5–28(–35) cm long.
Spikelets.
Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile
floret(s), with a barren rachilla extension, lanceolate, laterally compressed,
3–5 mm long.
Glumes. Glumes
similar, firmer than fertile lemma. Lower glume lanceolate, membranous, much
thinner on margins, keeled, 1-keeled, 1 -nerved. Upper glume lanceolate, 3.5 mm
long, membranous, keeled, 1-keeled, 1 -nerved. Upper glume surface asperulous.
Florets.
Fertile lemma 3 mm long, without keel, 5 -nerved. Lemma apex entire or dentate,
awned, 1 -awned. Median (principal) awn subapical or dorsal, 0.5–1 mm long
overall, without a column. Lodicules present. Anthers 3.
Continental
Distribution: Australasia.
Australian
Distribution: New South Wales, Victoria, Tasmania.
New
South Wales: Central
Coast, Central
Tablelands. Victoria: East Gippsland,
Eastern Highlands, Otway
Range, Snowfields. Tasmania: West Coast, Central Highlands,
South West.
Notes. Resembles D.
frigida, differing in the smaller spikelets, the lemma distinctly shorter
than the upper glume, and the shorter awn.
Endemic. In wet sclerophyll or
montane forest, in rocky habitats in montane forest. Flowers Nov.-Mar.
