Deyeuxia boormanii

HABIT Perennial; caespitose. Culms erect; (30–)50–150 cm long; 1–3 -noded. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1–5 mm long; truncate. Leaf-blades flat, or conduplicate; 10–35 cm long; 2–5 mm wide. Leaf-blade surface scaberulous; rough adaxially, or on both sides.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; (6–)15–35 cm long. Primary panicle branches spreading, or drooping.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5–2.5(–5) mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 2–2.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 1–2 mm long; 0.5 length of lemma.

GLUMES Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume lanceolate; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse.

FLORETS Fertile lemma ovate; 2.2–2.8 mm long; cartilaginous; without keel; 5 -veined. Lemma lateral veins prominent. Lemma surface smooth. Lemma apex acute; muticous, or awned; 1 -awned. Principal lemma awn subapical; straight; 0.5 mm long overall; not or scarcely exserted from spikelet. Rhachilla extension 0.5–1 mm long; pilose.

FLOWER Anthers 3; 0.5–0.6 mm long.

DISTRIBUTION Australasia: Australia.

NOTES Aveneae. Fl Australia 2010.

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