Description
A complete description is stored on the website efloras.org : "Plants perennial, woody, twining, glabrous. Stems to 5 m, often longitudinally wrinkled. Petiole 3.5-11 cm; leaf blade circular or ovate, 5-16 X 5-14 cm, base deeply cordate; lobes rounded or rarely angular, apex acuminate, mucronulate; lateral veins 7 or 8 pairs. Inflorescences 1- to few flowered; peduncle often 2.5-4.5(-7) cm. Pedicel 1.5-3 cm, thickened and clavate in fruit. Flowers nocturnal. Sepals ± circular, equal or outer 2 shorter, 1.5-2.5 cm, thinly leathery, apex obtuse or emarginate, mucronulate, enlarged in fruit and reflexed. Corolla white, with green midpetaline bands, salverform, 9-12 cm; limb 8-10 cm in diam. Stamens included; filaments inserted near base of corolla tube. Pistil included; ovary glabrous. Stigma 2-lobed. Capsule pale brown, ovoid to ± globose, 2-2.5 cm, glabrous. Seeds black, 1-1.2 cm, densely short tomentose, edges with ca. 3 mm long sericeous hairs. 2n = 30."
As quoted, the flower, so to say the corolla is to be white. Therefore Ipomoea violacea cannot be mistaken with Ipomoea tricolor, commonly called Heavenly blue, but for the cultivar Pearly gates which collora is also white. This mistake might be the result of the misleading binomial name Ipomoea violacea, violeaca meaning purple. Herbariums anyway show that the flower is entirely white
Read more about this topic: Ipomoea Violacea
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