Anthoxanthum monticola

HABIT Perennial; caespitose. Rhizomes short. Culms 20–40 cm long. Leaf-sheaths glabrous on surface. Ligule a ciliate membrane; 0.6 mm long. Leaf-blades involute; 1–2 mm wide; aromatic. Leaf-blade surface pubescent; hairy abaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong; 1.5–4.5 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 5–8 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; shiny. Lower glume ovate; 5–8 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume ovate; 5–8 mm long; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Basal sterile florets dissimilar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 1 length of fertile lemma; chartaceous; 1-keeled; 5 -veined; pubescent; dentate; 2 -fid; obtuse; awned. Awn of lower sterile floret 2–4 mm long. Lemma of upper sterile floret oblong; 1 length of lower sterile floret; chartaceous; pubescent; lobed; 2 -fid; obtuse; awned. Awn of upper sterile floret geniculate; 4–8 mm long. Fertile lemma ovate; 5–8 mm long; cartilaginous; without keel. Lemma surface pubescent; hairy above. Lemma margins convolute; covering most of palea. Lemma apex acute. Palea elliptic; 1 -veined; without keels.

FLOWER Anthers 2 (bisexual), or 3 (male); 1.2 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Europe: northern and eastern. Asia-temperate: Siberia, Soviet far east, China, Mongolia, and eastern Asia. North America: Subarctic, western Canada, eastern Canada, northwest USA, and northeast USA.

NOTES Aveneae. Fl Pac SW 1994.

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