From Flora of Indiana (1940) by Charles C. Deam
Infrequent to very rare throughout the state on the muddy shores of artificial ponds, in ditches, and in wet places in marshes.
Indiana Coefficient of Conservatism: C = 4
Wetland Indicator Status: OBL
Annual; stem 1-4 dm, glabrous or nearly so; lvs sessile, lanceolate to oblong, elliptic, or oblanceolate, 2-4 cm, narrowed to the base; pedicels stout, erect, 1-4(-10) mm; bractlets closely subtending and about equaling the cal; sep narrowly lanceolate, 4-6 mm; cor white, marked with purple lines internally, 8-12 mm; fr 5-9 mm; 2n=16. Wet woods; N.J. to O., Ill., and Io., s. to Fla. and Tex. May
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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