GrassBase - The Online World Grass Flora

Descriptions

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

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

Oreopoa

HABIT Perennial. Culms erect; 9–15 cm long. Ligule an eciliate membrane. Leaf-blades filiform, or linear; stiff.

INFLORESCENCE Inflorescence a panicle.

Panicle open.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 4–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite.

GLUMES Glumes persistent; shorter than spikelet. Lower glume elliptic; 0.75 length of upper glume; membranous; without keels; 1–3 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex erose; acute. Upper glume elliptic; 1 length of adjacent fertile lemma; membranous; with hyaline margins; without keels; 3 -veined. Upper glume apex erose; obtuse.

FLORETS Fertile lemma elliptic; membranous; much thinner on margins; without keel; wingless; 5–7 -veined. Lemma surface unwrinkled; without grooves. Lemma apex erose; acute. Apical sterile florets resembling fertile though underdeveloped.

DISTRIBUTION Temperate Asia.

Please cite this publication as detailed in How to Cite Version: 27th January 2014.