3. Merremia tuberosa (Linnaeus) Rendle in D. Oliver et al., Fl. Trop. Afr. 4(2): 104. 1905.
[I]
Ipomoea tuberosa Linnaeus, Sp. Pl. 1: 160. 1753; Operculina tuberosa (Linnaeus) Meisner
Stems glabrous. Leaf blades broadly ovate to rounded, palmately (5–)7-lobed, 80–150 × 80–150 mm; lobes lanceolate to elliptic, margins entire, surfaces glabrous. Inflorescences usually 4–8-flowered cymes, flowers rarely solitary. Flowers: sepals oblong, outers 25–30 mm, apex obtuse, mucronulate, inners 12–20 mm, apex acute, abaxial surface glabrous; corolla yellow, 50–60 mm.
Flowering Nov–Mar. Fields, hammocks, pinelands; 0–10 m; introduced; Fla.; Mexico; Central America; introduced also in West Indies, South America, Old World subtropics and tropics.
SELECTED REFERENCE Austin, D. F. 1998. Xixicamátic or wood rose (Merremia tuberosa, Convolvulaceae): Origins and dispersal. Econ. Bot. 52: 412–422.
