Agrostis arisan-montana

HABIT Perennial; caespitose; clumped loosely. Culms geniculately ascending; 40–100 cm long; 1–1.7 mm diam.; 3–6 -noded; rooting from lower nodes. Leaf-sheaths smooth. Ligule an eciliate membrane; 2–3.5 mm long; scaberulous on abaxial surface; obtuse. Leaf-blades 5–14 cm long; 2–6 mm wide. Leaf-blade surface scaberulous; rough on both sides. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate, or oblong; 10–20 cm long. Primary panicle branches ascending, or spreading; 3 -nate; 5–8 cm long; bearing spikelets almost to the base. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 1.9–2.3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume ovate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 1.9–2.3 mm long; 1.3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma oblong, or ovate; 1.4–1.7 mm long; hyaline; without keel; 4–5 -veined. Lemma apex erose; obtuse; muticous. Palea 0.35–0.75 mm long; 0.2–0.4 length of lemma; hyaline; 2 -veined.

FLOWER Anthers 3; 0.5–0.8 mm long.

DISTRIBUTION Asia-temperate: China and eastern Asia.

NOTES Aveneae. Fl China 2007.

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