Lachnagrostis leviseta

HABIT Perennial; caespitose. Culms erect; 50–65 cm long; 1–2 mm diam. Leaf-sheaths longer than adjacent culm internode; smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; (3–)5–6 mm long; acute. Leaf-blades erect; filiform; involute; 5–20 cm long; 0.5 mm wide; glaucous. Leaf-blade surface scaberulous.

INFLORESCENCE Inflorescence a panicle. Peduncle 10–15 cm long.

Panicle open; oblong; effuse; 10–25 cm long. Primary panicle branches spreading. Panicle branches stiff; scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3–16 mm long; scabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate, or elliptic; laterally compressed; (3.3–)3.5–4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.6–1 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; (3.3–)3.5–4 mm long; 1.1 length of upper glume; membranous; 1-keeled. Lower glume primary vein scabrous. Lower glume surface smooth, or asperulous. Lower glume apex acuminate. Upper glume lanceolate; 3.1–3.7 mm long; 1.8 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume primary vein scabrous. Upper glume surface smooth, or asperulous. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 1.7–2.1 mm long; hyaline; without keel; 5 -veined. Lemma surface pilose. Lemma hairs 0.5–0.7 mm long. Lemma apex entire, or dentate; 4 -fid; with lobes 0.1 mm long; truncate, or acute; muticous, or mucronate. Principal lemma awn subapical; 0.5 mm long overall. Palea 1.4–1.7(–2) mm long; 0.8 length of lemma; hyaline. Rhachilla extension (1.5–)1.7–2 mm long; pilose.

FLOWER Anthers 3; 0.7–0.9 mm long.

DISTRIBUTION Australasia: Australia.

NOTES Aveneae. Brown 2009.

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