GrassBase - The Online World Grass Flora


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

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

Anthoxanthum borii

HABIT Perennial. Rhizomes elongated. Culms 30–120 cm long. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths smooth; glabrous on surface, or pilose; with tubercle-based hairs. Ligule an eciliate membrane; erose; acute. Leaf-blade base broadly rounded. Leaf-blades 5–35 cm long; 4–12 mm wide; aromatic. Leaf-blade surface glabrous, or pilose; sparsely hairy.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate, or oblong; 5–12 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 6–8 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma; shiny. Lower glume lanceolate, or ovate; 4.5–5 mm long; 0.66–0.75 length of upper glume; chartaceous; yellow; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate, or ovate; 6–8 mm long; 2.5–3 length of adjacent fertile lemma; chartaceous; yellow; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Basal sterile florets dissimilar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret oblong; 5–6 mm long; chartaceous; without keels; 5 -veined; pubescent; dentate; 2 -fid; obtuse; awned. Awn of lower sterile floret dorsal; 3–4 mm long. Lemma of upper sterile floret oblong; 5–6 mm long; chartaceous; pubescent; dentate; 2 -fid; obtuse; awned. Awn of upper sterile floret dorsal; arising 0.33 way up back of lemma; straight; 10–12 mm long. Fertile lemma oblong, or orbicular; 2–3 mm long; 1.5–2 mm wide; cartilaginous; without keel; 3–7 -veined. Lemma lateral veins obscure. Lemma margins convolute; covering most of palea. Lemma apex obtuse. Palea lanceolate; 1.5–2 mm long; 2 -veined.

FLOWER Lodicules absent. Anthers 2, or 3; 2–4 mm long. Stigmas 2; pubescent.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-tropical: India.

NOTES Aveneae. Fl Kerala 1997.

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