Sepals 2-3 mm, to 4 mm in fruit. Capsules ovoid to ovoid-conic, broader at base. Seeds 0.5-0.6 mm. 2n = 40, 44- (both Europe).

Flowering spring-summer. Roadsides, open, sandy or rocky, disturbed sites; 0-1800 m; introduced; St. Pierre and Miquelon; Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask.; Ala., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Eurasia; n Africa; introduced in Australia.

From Flora of Indiana (1940) by Charles C. Deam

In very sandy soil along roadsides and railroads, in fallow fields, and rarely on bare spots on bluffs of streams. Naturalized in Indiana; I believe it could be found in railroad ballast in every county of the state.

Indiana Coefficient of Conservatism: C = null, non-native

Wetland Indicator Status: FAC