Narrow-leaved miterwort or hornpod

Mitreola sessilifolia (J. F. Gmelin) G. Don var. angustifolia Torrey & A. Gray, Fl. N. Amer. 2: 45. 1841

Herbs, 10–50 cm. Leaves usu­ally sessile, sometimes sub­sessile; blade usually narrowly elliptic, sometimes elliptic, 0.9–3.3 × 0.2–0.6(–0.7) cm, larger leaves 4–5 times as long as wide, base usually rounded, sometimes cuneate, surfaces gla­brous. Inflorescences congested, flowers longer than inter­nodes, ultimate branches 1–1.5 cm. Flowers sessile; calyx slightly ciliate along margins and midrib outside, glabrous within; corolla white, 2–3 mm, throat with ring of hairs. Capsules 2–4 mm, horns lightly tuber­culate mostly on inner faces. Seeds obliquely ellipsoid, 0.4 mm, reticulate.

Flowering Jun–Sep(–Oct). Coastal plain depressional wetlands; 0–30 m; Ala., Fla., Ga., Miss., S.C.

Cynoctonum angustifolium (Torrey & A. Gray) Small (1896) is a later homonym of C. angustifolium Decaisne (1844) and pertains here.