GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Poa damavandica

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms erect, or geniculately ascending; 25 cm long. Culm-internodes scaberulous. Leaves mostly basal. Leaf-sheaths longer than adjacent culm internode. Ligule an eciliate membrane; 2–2.8 mm long; obtuse. Leaf-blades conduplicate, or involute; 5–9.1 cm long; 1–1.3 mm wide; 4.8–7.2 cm long at summit of culm. Leaf-blade surface ribbed; scabrous. Leaf-blade apex hooded.

INFLORESCENCE Inflorescence a panicle; comprising 15–55 fertile spikelets.

Panicle contracted; oblong; 5–9.1 cm long; 0.6–1.1 cm wide. Primary panicle branches 2–3 -nate; 1.9–3.9 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 4 fertile florets; with diminished florets at the apex. Spikelets ovate, or cuneate; laterally compressed; 6 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous. Floret callus woolly.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume elliptic; 3 mm long; membranous; much thinner on margins; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume ovate; 3.5 mm long; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma elliptic; 3.2–3.5 mm long; membranous; yellow, or purple; keeled; 5 -veined. Lemma midvein ciliolate; hairy below. Lemma lateral veins obscure. Lemma margins ciliolate; hairy below. Lemma apex obtuse. Palea 2.7 mm long. Palea keels scaberulous; ciliate; adorned above; with 0.66 of their length adorned. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1.1 mm long; yellow.

DISTRIBUTION Asia-temperate: western Asia.

NOTES Poeae. Assadi & Kavousi 2011.

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