Anthoxanthum glabrum

HABIT Perennial; caespitose; clumped loosely. Rhizomes elongated. Culms 10–35 cm long. Leaf-sheaths pubescent. Ligule an eciliate membrane. Leaf-blades 3–9 cm long; 2–3 mm wide; aromatic. Leaf-blade apex abruptly acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or pyramidal; 3–5 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; 2.5–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; shiny. Lower glume ovate; 2.5–3 mm long; 1 length of upper glume; hyaline; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 2.5–3 mm long; 1.1–1.2 length of adjacent fertile lemma; hyaline; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse.

FLORETS Basal sterile florets similar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret oblong; 1 length of fertile lemma; coriaceous; dark brown; 1-keeled; 5 -veined; papillose; ciliate on margins; obtuse; muticous. Lemma of upper sterile floret oblong; 0.9 length of lower sterile floret; coriaceous; scabrous; ciliate on margins; dentate; 2 -fid; obtuse; muticous. Fertile florets female. Fertile lemma ovate; 2–2.5 mm long; membranous; dark brown; without keel; 5 -veined. Lemma surface puberulous; hairy above. Lemma margins convolute; covering most of palea. Lemma apex acute. Palea 1 -veined; without keels.

FLOWER Anthers 2 (bisexual), or 3 (male). Stigmas plumose. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: Siberia, Soviet far east, Soviet Middle Asia, China, and Mongolia.

NOTES Aveneae. Fl USSR 1994.

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