Lachnagrostis collicola

HABIT Annual, or perennial; short-lived; caespitose. Culms erect; 10–20 cm long; 2–3 -noded. Culm-nodes glabrous. Leaf-sheaths antrorsely scabrous. Ligule an eciliate membrane; 1.5–4 mm long; entire, or lacerate; obtuse. Leaf-blades flat, or conduplicate; 10–20 cm long; 1–2(–8) mm wide.

INFLORESCENCE Inflorescence a panicle; deciduous as a whole. Peduncle smooth, or scaberulous above, or antrorsely scabrous above; fracturing.

Panicle open; pyramidal; 15–25 cm long. Primary panicle branches whorled at lower nodes.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels clavate; 4 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 2.5–4 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 2.5–4 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate; muticous, or mucronate. Upper glume lanceolate; 2.5–4 mm long; 1.2–2.5 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate; muticous, or mucronate.

FLORETS Fertile lemma lanceolate; 1–3.5 mm long; hyaline; shiny; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma surface glabrous. Lemma apex dentate; 2–4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.05–0.1 way up back of lemma; straight; 2–4 mm long overall. Palea 0.8–0.85 length of lemma; hyaline. Palea apex entire, or dentate; 2 -fid. Rhachilla extension 0.2–2.5 mm long; pilose.

FLOWER Anthers 3; 0.4–0.8 mm long.

DISTRIBUTION Australasia: Australia.

NOTES Aveneae. Fl Australia 2010.

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