Apera spica-venti

Common names: Common windgrass Loose silkybent
Introduced
Treatment appears in FNA Volume 24. Treatment on page 789.

Culms 20-80(120) cm, stout, usually with several shoots, sparingly branched; internodes shorter or longer than the sheaths. Sheaths often purplish; ligules 3-6(12) mm; blades usually 6-16(25) cm long, 2-5(10) mm wide, flat. Panicles (5)10-35 cm long, (2)3-15 cm wide, usually open, pyramidal; branches spreading, naked at the base for 5+ mm, with spikelets usually borne towards the distal ends; pedicels 1-3 mm. Spikelets 2.4-3.2 mm, often purplish; rachillas prolonged for about 0.5 mm. Lower glumes 1.5-2.5 mm; upper glumes 2.4-3.2 mm; lemmas 1.6-3 mm, folded, scabridulous above midlength, awned, awns 5-12 mm; anthers 1-2 mm, greenish to yellowish, often purple-tinged. Caryopses 1-1.5 mm. 2n = 14.

Discussion

Apera spica-venti grows as a weed in lawns, waste places, grain fields, sandy ground, and roadsides. Introduced from Europe, it is found in scattered locations in the Flora region.

Selected References

None.

Lower Taxa

None.
... more about "Apera spica-venti"
Kelly W. Allred +
Adans. +
Common windgrass +  and Loose silkybent +
Conn. +, N.J. +, N.Y. +, Wash. +, Del. +, D.C +, Wis. +, Wyo. +, N.Mex. +, Pacific Islands (Hawaii) +, Ohio +, Pa. +, B.C. +, Ont. +, Mass. +, Maine +, Nev. +, Colo. +, Md. +, Calif. +, Oreg. +, Vt. +, Ill. +, Ind. +, Ariz. +, Idaho +, Mont. +, Tex. +, Utah +, Mo. +, Mich. +  and Ky. +
Introduced +
Gramineae +
Apera spica-venti +
species +