Alopecurus borii

HABIT Annual. Culms geniculately ascending, or decumbent; 10–30 cm long. Ligule an eciliate membrane; 1.5–4 mm long. Leaf-blades 1.2–4 mm wide. Leaf-blade surface scabrous; rough adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 2–6 cm long; 0.2–0.45 cm wide. Primary panicle branches accrescent to a central axis; with evident branchlets on axis. Panicle axis with rounded ribs; puberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 2.7–3.2 mm long; falling entire.

GLUMES Glumes connate along margins below; 0.25–0.33 of their length connate; similar; shorter than spikelet. Lower glume elliptic; 2.5–3 mm long; 1 length of upper glume; cartilaginous; 1-keeled; winged on keel; 3 -veined. Lower glume primary vein ciliolate. Lower glume apex acute. Upper glume elliptic; 2.5–3 mm long; 0.9 length of adjacent fertile lemma; cartilaginous; 1-keeled; winged on keel; 3 -veined. Upper glume primary vein ciliolate. Upper glume hairs 0.2 mm long. Upper glume apex acute.

FLORETS Fertile lemma ovate; 2.7–3.2 mm long; membranous; keeled; 5 -veined. Lemma margins connate below. Lemma apex truncate; muticous. Palea absent or minute.

FLOWER Lodicules absent. Anthers 3; 0.5–0.8 mm long. Stigmas terminally exserted; pubescent. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a spikelet.

DISTRIBUTION Asia-temperate: Soviet Middle Asia.

NOTES Aveneae. Mez 1996.

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