Poa olajensis

HABIT Perennial; caespitose; clumped loosely. Rhizomes short. Culms (25–)30–55 cm long. Leaf-sheaths tubular for much of their length; with 0.33(–0.5) of their length closed; glabrous on surface. Ligule an eciliate membrane; 0.5–1.5 mm long. Leaf-blades linear; 2–3 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or ovate; loose; (4–)5–8 cm long; with spikelets clustered towards branch tips. Primary panicle branches ascending. Panicle branches smooth.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising (3–)4–5(–6) fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; (6–)7–8.5(–11) mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent. Floret callus woolly.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 0.6–1.3(–1.5) mm long; 1 length of upper glume; membranous; 1-keeled. Lower glume apex acute. Upper glume ovate; 0.6–1.3(–1.5) mm long; 0.25 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume apex acute.

FLORETS Fertile lemma ovate; 4.5–5.5 mm long; membranous; much thinner above; keeled; 5 -veined. Lemma midvein pubescent. Lemma lateral veins prominent. Lemma surface pubescent; hairy below. Lemma apex acute. Palea keels pubescent; adorned below. Palea surface pubescent; hairy on back. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 2–2.5 mm long.

DISTRIBUTION Asia-temperate: Soviet far east.

NOTES Poeae. Probatova 2014.

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