Agrostis flaccida

HABIT Perennial; caespitose. Rhizomes short. Culms erect, or geniculately ascending; 15–30 cm long; 1 mm diam.; 3 -noded. Leaf-sheaths smooth. Ligule an eciliate membrane; 0.5–2 mm long; scaberulous on abaxial surface. Leaf-blades flat, or involute; 3–10 cm long; 0.5–2 mm wide. Leaf-blade surface smooth.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth.

Panicle open; ovate; 4–8 cm long; 3–4 cm wide. Primary panicle branches 2–5 -nate; 2–7 cm long. Panicle branches smooth, or scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–2 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2.5–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.2 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 2.5–3 mm long; 1.2 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2–2.5 mm long; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.

FLORETS Fertile lemma ovate; 1.5–2 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins obscure; extending close to apex. Lemma apex truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.05–0.1 way up back of lemma; geniculate; 3–5 mm long overall; with twisted column. Palea present, or absent or minute; 0–0.2 mm long; 0–0.1 length of lemma; hyaline.

FLOWER Lodicules 2; membranous. Anthers 3; 0.8–1.5 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: Soviet far east, China, and eastern Asia.

NOTES Aveneae. Koyama 1994.

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