Lobelia boykinii Torr. & A.Gray ex A.Dc.

Glabrous perennial 4–8 dm from a rather short rhizome, simple or sparingly branched, often immersed at base; lvs filiform, 5–20 mm, often deciduous before anthesis; raceme open, 1–2 dm; pedicels slender, spreading, 1–2 cm, exceeding the filiform bracts; bracteoles none; sep loose or spreading, filiform, 4–5 mm; cor 1 cm, blue with a white center, the lower lip bearded at base; fruiting hypanthium subglobose, 3 mm; 2n=14. Ponds and swamps on the coastal plain; N.J. to Fla. Rare. June.