Poa lavrenkoi

HABIT Perennial; caespitose; clumped loosely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms erect; 18–30 cm long. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths tubular for much of their length; with 0.8 of their length closed. Ligule an eciliate membrane; 0.5–0.8 mm long; truncate. Leaf-blades flat, or conduplicate; 1–2 mm wide; glaucous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic. Primary panicle branches 2–4 -nate. Panicle branches smooth.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 2.5–3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes scaberulous. Floret callus pilose. Floret callus hairs 0.33–0.5 length of lemma.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 1.8–2.2 mm long; 1–1.5 length of upper glume; membranous; 1-keeled. Lower glume apex acute. Upper glume elliptic, or ovate; 1.5 mm long; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma ovate; oblong in profile; 1.8–2.2 mm long; membranous; keeled; 5 -veined. Lemma midvein pubescent; hairy below. Lemma surface pubescent; hairy below; hairy on veins. Lemma apex acute. Palea 1 length of lemma. Palea keels smooth, or scaberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1–1.8 mm long.

DISTRIBUTION Europe: eastern.

NOTES Poeae. Kuczerov 2006.

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