Deyeuxia valida

HABIT Perennial; caespitose; clumped densely. Culms erect; robust; 28–140 cm long; 2–5 -noded. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 2–4 mm long; truncate, or obtuse. Leaf-blades flat, or involute; 5–22 cm long; 1–4 mm wide. Leaf-blade surface smooth, or scabrous; glabrous, or hirsute; sparsely hairy.

INFLORESCENCE Inflorescence a panicle.

Panicle open, or contracted; lanceolate, or ovate; 4.5–27 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5–4 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5.2–8.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1.5 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 1.2–1.3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 4.2–6.6 mm long; coriaceous; without keel; 5 -veined. Lemma lateral veins prominent. Lemma surface scaberulous; rough on veins. Lemma apex dentate; 4 -fid; acute; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; geniculate; 8–12 mm long overall; with twisted column. Rhachilla extension 0.7–2 mm long; pilose.

FLOWER Anthers 3; 1.8–3.7 mm long.

DISTRIBUTION Australasia: Australia.

NOTES Aveneae. Fl Australia 2010.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.