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.

Koeleria hirsuta

HABIT Perennial; caespitose; clumped densely. Butt sheaths thickened and forming a bulb; pubescent; persistent and investing base of culm; with compacted dead sheaths. Culms geniculately ascending; 10–35 cm long. Culm-internodes distally glabrous, or hirsute. Leaf-sheaths glabrous on surface, or pubescent. Ligule an eciliate membrane; 2 mm long; lacerate. Leaf-blades straight, or curved; convolute; 3–15 cm long; 0.5–2 mm wide; stiff. Leaf-blade surface puberulous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle. Peduncle pubescent above.

Panicle spiciform, or capitate; oblong, or ovate; 1–1.2 cm long; 0.2–0.5 cm wide. Panicle axis pubescent. Panicle branches pubescent.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–4 fertile florets; with a barren rhachilla extension, or with diminished florets at the apex. Spikelets obovate; laterally compressed; 4.5–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture; shiny; gaping. Lower glume lanceolate; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 1–3 -veined. Lower glume lateral veins absent. Lower glume surface villous. Lower glume apex acute. Upper glume lanceolate; 0.75 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3–5 -veined. Upper glume surface villous. Upper glume apex acute.

FLORETS Fertile lemma oblong; 4.5–6 mm long; membranous; shiny; keeled. Lemma surface villous. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn subapical; 1–3 mm long overall. Palea gaping. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Europe: central and southeastern.

NOTES Aveneae. Domin 1995.

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