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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 hookeri

HABIT Perennial. Culms decumbent; weak; 15–70 cm long. Lateral branches lacking. Ligule an eciliate membrane. Leaf-blades 8–16 cm long; 2–5 mm wide; flaccid.

INFLORESCENCE Inflorescence a panicle.

Panicle open, or contracted; lanceolate, or ovate; loose, or effuse; 4–17 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.2 mm long.

GLUMES Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma. Lower glume elliptic; 3.5 mm long; 0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume ovate; 6 mm long; 2 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Basal sterile florets dissimilar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret oblong; 5.5 mm long; chartaceous; without keels; 5 -veined; pilose; dentate; 2 -fid; mucronate. Awn of lower sterile floret dorsal; arising 0.5 way up back of lemma; 1.5 mm long. Lemma of upper sterile floret oblong; 5.5 mm long; chartaceous; pilose; lobed; 2 -fid; awned. Awn of upper sterile floret dorsal; arising 0.2 way up back of lemma; geniculate; 9–10 mm long. Fertile lemma oblong; 3 mm long; cartilaginous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma margins convolute; covering most of palea. Lemma apex obtuse. Palea oblong; 1 -veined; without keels.

FLOWER Lodicules absent. Anthers 2; 2.5 mm long. Stigmas 2; protogynous; pubescent.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

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

NOTES Aveneae. WDC 1994.

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