Poa sibirica

HABIT Perennial; caespitose. Rhizomes elongated. Culms erect; 50–120 cm long. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths scaberulous; glabrous on surface. Ligule an eciliate membrane; 1 mm long; obtuse. Leaf-blades 3.5–6 mm wide. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth.

Panicle open; oblong, or pyramidal; 6–18 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 4–5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 1–2 mm long; 0.33–0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3 mm long; 0.75–1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.

FLORETS Fertile lemma ovate; 3 mm long; membranous; keeled; 5 -veined. Lemma apex acute. Palea 1 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 1.3–1.5 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

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

NOTES Poeae. Man Korean Gr 1994.

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