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 akmanii

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms 5–14 cm long; 0.15–0.25 mm diam.; 0–1 -noded. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths open for most of their length; with 0.15–0.25 of their length closed. Ligule an eciliate membrane; 3–6 mm long; 1.5–4 mm long on basal shoots; acute. Leaf-blades filiform; conduplicate; 1–4 cm long; 0.4–0.5 mm wide.

INFLORESCENCE Inflorescence a panicle; comprising 10–20 fertile spikelets.

Panicle open; linear, or lanceolate; 1–5 cm long. Primary panicle branches ascending; 1–2 -nate; 0.3–1.2 cm long. Panicle branches smooth.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–4 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 3.5–4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5–0.7 mm long; smooth; glabrous. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.4–4.4 mm long; 1 length of upper glume; membranous; 1-keeled; 1–3 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acute. Upper glume lanceolate; 2–4.3 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 2.3–4.3 mm long; membranous; much thinner on margins; keeled; 5 -veined. Lemma midvein ciliolate. Lemma lateral veins obscure. Lemma margins ciliolate. Lemma hairs 0.15–0.3 mm long. Lemma apex acute. Palea keels scabrous; adorned above; with 0.5 of their length adorned.

FLOWER Lodicules 2; membranous. Anthers 3; 0.9–1.3 mm long.

FRUIT Caryopsis with adherent pericarp; lanceolate; 2 mm long. Hilum punctiform.

DISTRIBUTION Asia-temperate: western Asia.

NOTES Poeae. Soreng 2004.

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