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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 utriculatus

HABIT Annual; culms solitary, or caespitose. Culms geniculately ascending; 4–40 cm long; 3–4 -noded. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 2–4 mm long; erose; truncate. Leaf-blades 0.7–12 cm long; 0.8–8 mm wide. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle; subtended by an inflated leaf-sheath.

Panicle spiciform; oblong, or ovate; 0.8–4 cm long; 0.6–1.5 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 elliptic; laterally compressed; 5–8.5 mm long; falling entire.

GLUMES Glumes connate along margins below; 0.33–0.5 of their length connate; similar; reaching apex of florets. Lower glume lanceolate; 5–8.5 mm long; 1 length of upper glume; membranous; 1-keeled; winged on keel; winged above; 3 -veined. Lower glume primary vein ciliate. Lower glume surface pilose; hairy below. Lower glume apex acute. Upper glume lanceolate; 5–8.5 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; winged on keel; winged above; 3 -veined. Upper glume primary vein ciliate. Upper glume surface pilose; hairy below. Upper glume apex acute.

FLORETS Fertile lemma oblong; 5–8.5 mm long; membranous; keeled; 5 -veined. Lemma margins connate below; with 0.5 of their length connate. Lemma apex acute; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25 way up back of lemma; geniculate; 6–15 mm long overall; with twisted column. Palea absent or minute.

FLOWER Lodicules absent. Anthers 3; 3.2–4.2 mm long. Stigmas terminally exserted; pubescent. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a spikelet.

DISTRIBUTION Europe: southeastern. Africa: north. Asia-temperate: western Asia. Pacific: southwestern.

NOTES Aveneae. Fl Turk 1993.

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