Utricularia purpurea Walter

Stems submersed, to 1 m; lvs in whorls of 5–7, verticillately branched into filiform segments, many of which bear a terminal bladder; flowering branches 3–15 cm, 1–4-fld; cor 1 cm, violet or red-violet, the lower lip with a basal yellow spot, 3-lobed, the lateral lobes strongly and separately elevated at base into a palate; spur shorter than and appressed to the lower lip. Quiet water; Que. and N.S. to Minn. and n. Ind., s. along the coastal plain to Fla. and La.; W.I. July–Sept. (Vesiculina p.)