Deyeuxia drummondii

Deyeuxia drummondii (Steud.) Vickery. Contr. New South Wales Natl Herb. 1: 49 (1940).

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

Basionym and/or Replacement Name:  Dichelachne drummondiana Steud., Syn. Pl. Glumac. 1: 120 (1854).

Type of Basionym or Protologue Information: HT: J. Drummond IV, 371, Australia: Western Australia: fl. Cygnorum (P; IT: K (photo, SI), L, LE). L lists their specimen as HT.

Key references (books and floras): [1878] G.Bentham, Flora Australiensis 7 (580), [1952] C.A.Gardner, Flora of Western Australia 1 Gramineae (156), [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of Australia, [2009] A.Wilson (ed.). Flora of Australia, Vol 44A. Poaceae 2 (197).

Illustrations: [1952] C.A.Gardner, Flora of Western Australia 1 Gramineae (157, Pl. 47).

Habit. Annual or perennial. Culms decumbent, stature slender to delicate, 5–25 cm tall, 2–3 -noded. Lateral branches simple. Leaves mostly basal. Leaf-sheaths smooth, glabrous on surface. Ligule an eciliate membrane, 2–3.5 mm long, membranous, lacerate. Leaf-blades linear, flat, 1–8 cm long, 1–1.5 mm wide. Leaf-blade surface glabrous.

Inflorescence. Inflorescence compound, a panicle. Panicle linear or oblong, 1.5–4 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, 6–8 mm long.

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

Florets. Fertile lemma 3.5 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. Palea apex dentate. Lodicules present. Anthers 3.

Continental Distribution: Australasia.

Australian Distribution: Western Australia.

Western Australia: Eyre.

Notes. Endemic.

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