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Ipomoea tuberculata Ker-Gawl. [family CONVOLVULACEAE]

Date Updated: 19 August 2007

Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (1963) Author: B. VERDCOURT (East African Herbarium)
Names
Ipomoea tuberculata Ker-Gawl. [family CONVOLVULACEAE], in Edwards, Bot. Reg. 1, t. 86 (Feb. 1816). Type : plant cultivated in England from seed from Calcutta; no specimen now known. Ipomoea dasysperma Jacq. [family CONVOLVULACEAE], Eclog. Pl. 1 : 132, t. 89 (Aug. 1816); Bak. & Rendle in F.T.A. 4(2): 179(1905); Meeuse in Bothalia 6 : 760(1958). Type: a plant cultivated at Vienna from seed stated to have come from China (? W.) Ipomoea calcarata Rendle [family CONVOLVULACEAE], in F.T.A. 4 (2) : 180 (1905). Type : Bechuanaland, Ngami-land, Kwebe, Lugard 182 (K, lecto.!)
Information
Glabrous annual; stems slender, smooth or tuberculate, 1–2–4 m. long. Leaf-blade round in outline, biternately or digitately 5–9-lobed, up to 12 cm. long and wide; lobes linear-lanceolate to elliptic, acute, 3–8 cm. long, 1–4 cm. wide; petiole 2–7 cm. long; pseudo-stipules present. Peduncle 1–3-flowered, 2.5–7 cm. long; pedicels woody, clavate, up to 1 cm. long. Sepals orbicular to elliptic-ovate, obtuse, smooth or verruculose, somewhat unequal, the outer 3 shorter and broader, 6–12 mm. long and 5–8 mm. wide, gibbous and 1–2-tuberculate at the base. Corolla yellow or white with a purple centre, funnel-shaped with a narrow tube, 5–10 cm. long. Capsule globose, 6–11 mm. in diameter. Seeds subglobose-trigonous, 5 mm. in diameter, brown, with adpressed pubescence and sometimes with long hairs on the angles.
Range
DISTR. (of the species as a whole). extending to Ceylon and India; also reported from China, probably in error
Distribution (external)
South West Africa South Africa Southern Rhodesia Eritrea Ethiopia
Ipomoea tuberculata Ker-Gawl. [family CONVOLVULACEAE]
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