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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Anthoxanthum potaninii

HABIT Perennial; caespitose; clumped loosely. Rhizomes short. Culms erect; 50–120 cm long. Culm-internodes smooth. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 4–8 mm long. Leaf-blades flat; 8–15 cm long; 6–14 mm wide. Leaf-blade surface smooth, or scaberulous; rough adaxially; glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 12–22 cm long; 2–6 cm wide. Panicle branches smooth.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 4–6 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet, or reaching apex of florets; thinner than fertile lemma; shiny. Lower glume lanceolate; 2–4 mm long; 0.5–0.7 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface smooth; glabrous. Lower glume apex obtuse, or acute. Upper glume lanceolate; 3–6 mm long; membranous; 1-keeled; 3 -veined. Upper glume primary vein smooth. Upper glume surface glabrous. Upper glume apex obtuse, or acute.

FLORETS Basal sterile florets similar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret lanceolate; 4–6 mm long; chartaceous; 1-keeled; 5 -veined; scabrous; ciliolate on margins; emarginate. Lemma of upper sterile floret lanceolate; 4–6 mm long; chartaceous; scabrous; ciliate on margins; emarginate; awned. Awn of upper sterile floret 2–4 mm long. Fertile lemma lanceolate; 3 mm long; cartilaginous; shiny; without keel. Lemma surface scaberulous; rough above. Lemma margins convolute; covering most of palea. Lemma apex obtuse. Palea 1 -veined; without keels.

FLOWER Lodicules 2. Anthers 2 (bisexual), or 3 (male); 2–3.5 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Tsvelev 2001.

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