Acaulescent, with slender creeping rhizomes, and producing leafy stolons after anthesis; lvs variously hairy or glabrous, oblong to ovate or obovate, finely crenate, obtuse or rounded at the tip, rounded to truncate or cuneate at base, mostly 1.5–2.5 times as long as wide; peduncles shorter to longer than the lvs; pet white, the 3 lower with brown-purple veins near the base, the 2 lateral ones beardless or slightly bearded; cleistogamous fls on short, erect peduncles; frs oblong-ellipsoid, 7–10 mm; seeds reddish-brown to black; 2n=24. Moist, open meadows and stream-banks, especially in sandy soil; N.B. to Fla., w. to Ind., Tenn., Okla., and Tex., more common eastward. Apr.–June.