Agrostis sinocontracta

HABIT Annual. Culms 30–50 cm long; 1–1.5 mm diam.; 3–4 -noded. Culm-internodes scaberulous. Leaves cauline. Ligule an eciliate membrane; 1–2 mm long; truncate. Leaf-blades 10–13 cm long; 3–5 mm wide. Leaf-blade surface scabrous. Leaf-blade margins scabrous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate; 10–15 cm long; 3 cm wide. Primary panicle branches 5–10 -nate; whorled at most nodes. Panicle branches smooth; glabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels smooth; glabrous; tip widened.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; 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; 1.1 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; 2.5–3 mm long; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma elliptic; 1.5–1.7 mm long; hyaline; without keel; 5 -veined. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66–0.75 way up back of lemma; geniculate; 3 mm long overall; with twisted column. Palea 0.3 mm long; 0.2 length of lemma; hyaline.

FLOWER Lodicules 2; membranous. Anthers 3; oblong; 0.6 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Tong & Yang 1996.

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