Poa boreorossica

HABIT Perennial; caespitose; clumped densely. Basal innovations extravaginal. Culms 15–49 cm long. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 0.5–1 mm long. Leaf-blades flat, or convolute; 0.8–4 mm wide; stiff. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or pyramidal; dense; 4–10 cm long. Primary panicle branches 3–4 -nate. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–4 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 3.2–3.7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 2.4–3 mm long; 0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 2.7–3.5 mm long; 0.9 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma ovate; 3–3.7 mm long; membranous; keeled; 5 -veined. Lemma surface pubescent; hairy below; hairy on veins. Lemma apex acute. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1.2–1.6 mm long.

DISTRIBUTION Europe: eastern.

NOTES Poeae. Tsvelev 2014.

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