Poa rehmannii

HABIT Perennial; caespitose; clumped moderately. Basal innovations extravaginal. Culms erect; 30–40 cm long. Culm-internodes elliptical in section; smooth. Lateral branches lacking. Leaf-sheaths keeled; glabrous on surface. Ligule an eciliate membrane; 0.3–0.5 mm long; truncate. Leaf-blades 4–5 mm wide; glaucous. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; equilateral, or nodding; 10–12 cm long. Primary panicle branches 3–5 -nate. Panicle branches terete; scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–5 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; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 0.75–0.85 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma ovate; elliptic in profile; 3 mm long; membranous; keeled; 5 -veined. Lemma midvein ciliate. Lemma surface puberulous; hairy on veins. Lemma margins ciliate; hairy below. Lemma apex acute. Palea keels scaberulous; adorned above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Europe: eastern.

NOTES Poeae. Fl Eur 1995.

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