Poa tzvelevii

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms erect; 15–20 cm long; with 0.1 of their length below uppermost node. Lateral branches lacking. Leaf-sheaths antrorsely scabrous; glabrous on surface. Ligule an eciliate membrane; 2–2.3 mm long; 1.5–2 mm long on basal shoots. Leaf-blades convolute; 0.5–1.7 mm wide. Leaf-blade surface scabrous.

INFLORESCENCE Inflorescence a panicle. Peduncle scaberulous above.

Panicle open, or contracted; lanceolate; 3–3.5 cm long. Primary panicle branches appressed; 1–2 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 4–5.6 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent. Floret callus pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.7–4 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume ovate; 2.7–4 mm long; 0.7–0.9 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3.3–4.2 mm long; membranous; keeled; 5 -veined. Lemma midvein ciliate; hairy below. Lemma surface asperulous; rough above. Lemma margins ciliate; hairy below. Lemma apex acute. Palea keels scabrous; adorned below. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1–1.3 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: Soviet far east.

NOTES Poeae. Probat 2005.

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