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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.
Alopecurus gerardii
HABIT Perennial. Rhizomes elongated. Culms erect, or geniculately ascending; 7–40 cm long; 2 -noded. Culm-internodes smooth; distally glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1–2 mm long; truncate. Leaf-blades 1–7 cm long; 1–4.2 mm wide. Leaf-blade surface glabrous. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle; subtended by an inflated leaf-sheath.
Panicle spiciform; ovate; 1–2 cm long; 0.7–1 cm wide. Primary panicle branches accrescent to a central axis; with evident branchlets 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; 4–6.3 mm long; falling entire.
GLUMES Glumes connate along margins below; 0.1 of their length connate; similar; exceeding apex of florets; recurved at apex. Lower glume lanceolate; 4–6.3 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein ciliate. Lower glume surface pilose. Lower glume apex acute; mucronate, or awned; 1 -awned. Lower glume awn 0.5–1.5 mm long. Upper glume lanceolate; 4–6.3 mm long; 1.3–1.5 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein ciliate. Upper glume surface pilose. Upper glume mucronate, or awned; 1 -awned. Upper glume awn 0.5–1.5 mm long.
FLORETS Fertile lemma oblong; 3–4 mm long; membranous; keeled; 5 -veined. Lemma surface with conspicuous apical hairs. Lemma margins free. Lemma apex truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33–0.5 way up back of lemma; straight; 0.8–6 mm long overall; not or scarcely exserted from spikelet. Palea linear; 2.5–3.5 mm long; 0.8–0.9 length of lemma; 1 -veined; 1-keeled. Palea keels ciliate; adorned above; with 0.5 of their length adorned. Palea apex acuminate.
FLOWER Lodicules absent. Anthers 3; 2–2.5 mm long. Stigmas terminally exserted; pubescent.
FRUIT Disseminule comprising a spikelet.
DISTRIBUTION Europe: northern, southwestern, and southeastern. Africa: north. Asia-temperate: western Asia.
NOTES Aveneae. Fl Turk 2007.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
