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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 sikkimense

HABIT Annual. Culms weak; 15–30 cm long. Lateral branches lacking. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 2 mm long; erose. Leaf-blades 5–10 cm long; 1–2 mm wide; flaccid; aromatic. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 2–5.5 cm long; 1 cm wide. Panicle axis scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 5.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 3 mm long; 0.5 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 5.5 mm long; 1.5 length of adjacent fertile lemma; membranous; with scarious margins; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acuminate; mucronate.

FLORETS Basal sterile florets dissimilar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret oblong; 5 mm long; chartaceous; without keels; 5 -veined; pubescent; dentate; 2 -fid; obtuse; awned. Awn of lower sterile floret dorsal; 2–4 mm long. Lemma of upper sterile floret oblong; 5 mm long; chartaceous; pubescent; dentate; 2 -fid; obtuse; awned. Awn of upper sterile floret dorsal; arising 0.1–0.2 way up back of lemma; geniculate; 9 mm long. Fertile lemma oblong; 3.5 mm long; cartilaginous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma margins convolute; covering most of palea. Lemma apex emarginate. Palea oblong; 1 -veined; without keels.

FLOWER Lodicules absent. Anthers 3. Stigmas 2; protogynous; pubescent.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India.

NOTES Aveneae. Fl Assam 1994.

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