Deyeuxia gunniana

Deyeuxia gunniana (Nees) Benth. Fl. Austral. 7: 584 (1878).

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

Basionym and/or Replacement Name:  Echinopogon gunnianus Nees, London J. Bot. 2: 413 (1843).

Type of Basionym or Protologue Information: Hampstead Hills, insulae Van Diemen Feb 1837, Gunn 1011.

Key references (books and floras): [1878] G.Bentham, Flora Australiensis 7 (584), [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 (202), [2009] A.Wilson (ed.). Flora of Australia, Vol 44A. Poaceae 2 (211).

Illustrations: [2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of New South Wales, 4th edn (202), [2009]. A.Wilson (ed.), Flora of Australia 44A: Poaceae 2 (205, Fig.28).

Habit. Perennial. Culms erect or geniculately ascending, stature slender to delicate, 7–40 cm tall, 2–3 -noded. Lateral branches simple or branched. Leaves mostly basal. Ligule an eciliate membrane, 1 mm long, membranous, truncate or obtuse. Leaf-blades filiform, conduplicate or convolute, 2–15 cm long, 0.5–0.8 mm wide. Leaf-blade surface smooth or scaberulous.

Inflorescence. Inflorescence compound, a panicle. Panicle lanceolate or oblong or ovate or pyramidal, dense, 1.5–9 cm long.

Spikelets. Spikelets pedicelled. Fertile spikelets 1-flowered, comprising 1 fertile floret(s), with a barren rachilla extension, elliptic, laterally compressed, 1.6–2 mm long.

Glumes. Glumes similar, thinner than fertile lemma. Lower glume ovate, membranous, keeled, 1-keeled, 1 -nerved. Upper glume ovate, 0.8–1.3 mm long, membranous, keeled, 1-keeled, 1 -nerved.

Florets. Fertile lemma 1.5–2 mm long, without keel or keeled, 3–5 -nerved. Lemma apex awned, 1 -awned. Median (principal) awn subapical, 0.5 mm long overall. Anthers 3.

Continental Distribution: Australasia.

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

Queensland: Darling Downs. New South Wales: North Coast, Northern Tablelands, Central Tablelands, Southern Tablelands. Victoria: East Gippsland, Snowfields. Tasmania: North West, West Coast, Central Highlands, Ben Lomond, South West.

Notes. Endemic. Grows in shady or wet situations by creek and river banks, and by the margins of swamps.

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