Deyeuxia decipiens

Deyeuxia decipiens (R. Br.) Vickery. Contr. New South Wales Natl. Herb. 1: 70 (1940).

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

Basionym and/or Replacement Name:  Agrostis decipiens R. Br., Prodr. 172 (1810).

Type of Basionym or Protologue Information: Australia.

Key references (books and floras): [1810]. R.Brown, Prodromus (172 as Agrostis decipiens), [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 (201), [2009] A.Wilson (ed.). Flora of Australia, Vol 44A. Poaceae 2 (206).

Illustrations: [2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales, 4th edn (201), [2009]. A.Wilson (ed.), Flora of Australia 44A: Poaceae 2 (205, Fig.28).

Habit. Perennial. Culms erect, 45–100 cm tall, 3–4 -noded. Mid-culm internodes glabrous. Mid-culm nodes glabrous. Lateral branches simple. Leaves mostly basal. Leaf-sheaths scaberulous. Ligule an eciliate membrane, 2–4 mm long, membranous, abaxially scaberulous, lacerate, truncate or obtuse. Leaf-blades aciculate or filiform or linear, involute or convolute, 10–30 cm long, 3–4 mm wide. Leaf-blade surface scabrous.

Inflorescence. Inflorescence compound, a panicle. Panicle 12–34 cm long.

Spikelets. Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile floret(s), without rachilla extension or with a barren rachilla extension, lanceolate, laterally compressed, (1.5–)2–3 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, 2–3 mm long, membranous, keeled, 1-keeled, 1 -nerved. Upper glume surface asperulous.

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

Continental Distribution: Australasia.

Australian Distribution: Queensland, New South Wales, Victoria, Tasmania.

Queensland: Darling Downs. New South Wales: Central Coast, South Coast, Central Tablelands, Southern Tablelands. Victoria: East Gippsland. Tasmania: East Coast.

Notes. Endemic. Usually on sandy soils, under light forest, often in hilly country or wet places. Flowers spring.

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