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Descriptions

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

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

Alopecurus bulbosus

HABIT Perennial; caespitose. Culms erect, or geniculately ascending; 15–50 cm long; swollen at the base; forming an ovoid corm. Ligule an eciliate membrane; 2–6 mm long. Leaf-blades flat, or convolute; 1.5–12 cm long; 1–3.5 mm wide. Leaf-blade surface smooth.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 1.5–7 cm long; 0.3–0.5 cm wide. Primary panicle branches accrescent to a central axis; with evident branchlets on axis, or with lateral stumps on axis. Panicle axis with rounded ribs.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 3–4 mm long; falling entire.

GLUMES Glumes connate along margins below; 0.33–0.5 of their length connate; similar; exceeding apex of florets. Lower glume oblong; 3–4 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein ciliolate. Lower glume surface pubescent; hairy below. Lower glume apex acute. Upper glume oblong; 3–4 mm long; 1.2–1.3 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein ciliolate. Upper glume surface pubescent; hairy below. Upper glume apex acute.

FLORETS Fertile lemma oblong; 2.5–3.5 mm long; membranous; keeled; 4 -veined. Lemma margins connate below. Lemma apex truncate; pubescent; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1–0.2 way up back of lemma; geniculate; 5–7 mm long overall; clearly exserted from spikelet; with a straight or slightly twisted column. Palea absent or minute.

FLOWER Lodicules absent. Anthers 3; 2 mm long. Stigmas protogynous; terminally exserted; pubescent. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; 1.6 mm long. Hilum punctiform. Disseminule comprising a spikelet.

DISTRIBUTION Europe: northern, central, southwestern, and southeastern. Africa: north. Asia-temperate: western Asia.

NOTES Aveneae. CEH.

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