Lachnagrostis batesii

HABIT Annual, or perennial; short-lived; caespitose. Culms geniculately ascending; 15–40 cm long; 1 mm diam. Culm-nodes brown, or purple; glabrous. Lateral branches lacking, or sparse. Leaf-sheaths mostly shorter than adjacent culm internode; smooth. Ligule an eciliate membrane; 2–5 mm long; lacerate; acute. Leaf-blades spreading; 8–12 cm long; (1–)2 mm wide. Leaf-blade surface smooth. Leaf-blade margins scaberulous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; effuse; 12–25 cm long. Primary panicle branches spreading. Panicle branches capillary; flexuous; scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate, or elliptic; laterally compressed; (1.8–)2–2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.4–0.6 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; (1.8–)2–2.5 mm long; 1 length of upper glume; membranous; 1-keeled. Lower glume primary vein scabrous. Lower glume surface smooth, or asperulous. Lower glume apex acute. Upper glume lanceolate; (1.8–)2–2.5 mm long; 1.2–1.4 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume primary vein scabrous. Upper glume surface smooth, or asperulous.

FLORETS Fertile lemma oblong; 1.4–2 mm long; hyaline; without keel; 5 -veined. Lemma surface pilose. Lemma hairs 0.4–0.6 mm long. Lemma apex dentate; 4 -fid; with lobes 0.1–0.2 mm long; awned; 1 -awned. Principal lemma awn dorsal; arising 0.75 way up back of lemma; straight; 1.2–2 mm long overall. Palea 0.75 length of lemma; hyaline. Rhachilla extension 0.5–1.3 mm long; pilose.

FLOWER Anthers 3; 0.2–0.3(–0.4) mm long.

DISTRIBUTION Australasia: Australia.

NOTES Aveneae. Brown 2009.

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