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Corispermum americanum var. americanum
Family: Amaranthaceae
American Bugseed
[Corispermum marginale Rydb. p.p.,  more]
Corispermum americanum var. americanum image
Inflorescences interrupted or condensed distally. Fruits (2.3-)2.5-3.5 mm; wing usually 0.2-0.3 mm wide (occasionally fruits almost wingless in some southwestern plants). Flowering late summer-fall. Sand dunes, sandy and gravely shores, sandy waste places, fields; 100-2000 m; Alta., B.C., Man., Ont., Que., Sask.; Ariz., Ark., Calif., Colo., Idaho, Ill., Ind., Kans., Minn., Mo., Mont., Nebr., Nev., N.J., N.Mex., N.Y., N.Dak., Ohio, Okla., Oreg., S.Dak., Tex., Utah, Wash., Wis., Wyo.; n Mexico (Chihuahua); probably Europe (locally introduced and confused with C. nitidum).
From Flora of Indiana (1940) by Charles C. Deam
On sand dunes. Known from Lake and Porter Counties only.
Much like no. 2 [Corispermum hyssopifolium L.], but with merely angled frs 2-3 mm; infl ┬▒densely pubescent, esp. when young; bracts overlapping, but exposing the axis along the lower part of the infl; 2n=18. Native of Eurasia, now established as a weed in much of the U.S., esp. in sandy soil and along lake-shores. (C. emarginatum; C. villosum)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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