Aristida tsangpoensis

HABIT Perennial; caespitose. Culms 20–30 cm long; 0.5–1 mm diam.; 1–2 -noded. Leaves mostly basal. Ligule a fringe of hairs. Leaf-blades involute; 3–6 cm long; 1–2 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear; 10 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 9–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent; obtuse.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 4–7 mm long; 0.7–0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 9–12 mm long; 1.3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.

FLORETS Fertile lemma elliptic; subterete; 7–9 mm long; coriaceous; without keel; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex acute; awned; 3 -awned. Principal lemma awn 3-branched; with 10–12 mm long limb; with twisted column; persistent. Column of lemma awn 2 mm long. Lateral lemma awns 7 mm long; shorter than principal. Palea 0.2 length of lemma; without keels.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Aristideae. Liou 1996.

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