Beach moonflower

Calonyction tuba (Schlechtendal) Colla; Ipomoea tuba (Schlechtendal) G. Don

Perennials or lianas. Stems twining, not setose. Leaf blades usually cordate, orbiculate, or ovate, sometimes 3-lobed, 50–160 × 40–150 mm overall, base cordate, surfaces glabrous. Peduncles hairy, hairs retrorse to spreading. Flowers nocturnal; sepals orbiculate or ovate, 15–25 mm, her­baceous, apex emarginate, obtuse, or truncate, abaxial surfaces glabrous or proximally sparsely hirsute; corolla white, limb with yellowish lines, salverform, 50–120 mm. 2n = 30.

Flowering year-round. Dunes, littoral, mangrove sites; 0–50 m; Fla., Tex.; Mexico; West Indies; Central America; South America; introduced in Asia, Australia.

The name Ipomoea violacea has been misapplied to plants of I. tricolor.