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 repens

HABIT Perennial; mat forming. Rhizomes elongated. Butt sheaths grey. Culms 20–50 cm long. Ligule an eciliate membrane; 2–3.5 mm long. Leaf-blades 7–9 mm wide; pruinose; aromatic.

INFLORESCENCE Inflorescence a panicle; comprising 120–160 fertile spikelets.

Panicle open; ovate; 6.5–10 cm long. Primary panicle branches 1–2 -nate. Panicle axis 11–12 noded.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels puberulous; hairy at tip; with 0.1–0.3 mm long hairs.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 3.4–4.2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.3–0.6 mm long.

GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; shiny. Lower glume ovate; 3.4–4.2 mm long; 1 length of upper glume; membranous; 1-keeled. Lower glume apex acute. Upper glume ovate; 3.4–4.7 mm long; 1.2–1.4 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume apex acute.

FLORETS Basal sterile florets similar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 3.3–3.8 mm long; chartaceous; 1-keeled; 5 -veined; ciliate on margins; entire, or dentate; 2 -fid; mucronate. Awn of lower sterile floret terminal, or subapical; 0.2–0.5 mm long. Lemma of upper sterile floret oblong; 3.3–3.8 mm long; chartaceous; ciliate on margins; entire, or dentate; 2 -fid; mucronate, or awned. Awn of upper sterile floret terminal, or subapical; straight; 0.2–0.5 mm long. Fertile florets female. Fertile lemma ovate; 2.5–3.5 mm long; cartilaginous; without keel. Lemma surface pubescent; hairy above. Lemma margins convolute; covering most of palea. Lemma apex acute. Palea 1 -veined; without keels.

FLOWER Anthers 2 (bisexual), or 3 (male); 1.6–2.7 mm long. Staminodes present. Stigmas pubescent. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Europe: central, southeastern, and eastern. Asia-temperate: Siberia, Soviet Middle Asia, and Caucasus.

NOTES Aveneae. Weimarck 1994.

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