Deyeuxia minor

Deyeuxia minor Benth. Fl. Austral. 7: 582 (1878).

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

Type of Basionym or Protologue Information: Australia, Tasmania, Southport: Stuart (K lecto).

Key references (books and floras): [1878] G.Bentham, Flora Australiensis 7 (582), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of Australia, [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia (212), [2009] A.Wilson (ed.). Flora of Australia, Vol 44A. Poaceae 2 (199).

Illustrations: [2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia  (196, Fig. 27; 212, fig. 159).

Habit. Perennial. Culms erect or geniculately ascending, stature slender to delicate, 8–45(–62) cm tall, 3 -noded. Mid-culm nodes glabrous. Lateral branches simple. Leaves mostly basal. Leaf-sheaths scaberulous. Ligule an eciliate membrane, 1–2 mm long, membranous, erose, truncate or obtuse. Leaf-blades linear, flat or involute, 2–20 cm long, 1–2 mm wide. Leaf-blade surface scabrous.

Inflorescence. Inflorescence solid, a panicle. Panicle oblong or ovate, dense, 1–5 cm long, 0.5–0.9 cm wide.

Spikelets. Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile floret(s), without rachilla extension or with a barren rachilla extension, lanceolate, laterally compressed, 3–4 mm long.

Glumes. Glumes similar, firmer than fertile lemma. Lower glume lanceolate, membranous, keeled, 1-keeled, 1 -nerved. Upper glume lanceolate, membranous, keeled, 1-keeled, 1 -nerved. Upper glume surface asperulous.

Florets. Fertile lemma 3 mm long, without keel, 5 -nerved. Lemma apex dentate, awned, 1 -awned. Median (principal) awn dorsal, 4–5 mm long overall, with a twisted column. Lodicules present. Anthers 3.

Continental Distribution: Australasia.

Australian Distribution: South Australia, Victoria, Tasmania.

South Australia: Southern Lofty, Kangaroo Island, South-eastern. Victoria: East Gippsland, Eastern Highlands, Gippsland Plain, Grampians, Otway Plain, Otway Range, Wilsons Promontory, Wannon. Tasmania: East Coast, South West.

Notes. Endemic.Under light eucalypt cover or margins of wet sclerophyll forest. Flowers Nov.-Dec.

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