Compilation
Merremia tuberosa

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Name

Identification
Merremia tuberosa (L.) Rendle [family CONVOLVULACEAE ]
Related name
  • Merremia tuberosa
Common name
  • woodrose; yellow morning glory; Brazilian jalap (the root)., Burkill, H.M. 1985. The useful plants of west tropical Africa, Vol. 1

Flora

Entry for MERREMIA tuberosa (L.) Rendle [family CONVOLVULACEAE]
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
MERREMIA tuberosa (L.) Rendle [family CONVOLVULACEAE], in F.T.A. 4 (2) : 104 (1905); van Ooststr. in Fl. Males., ser. 1, 4 (4) : 447, fig. 29 (1953). Types : Jamaica ?, specimen 219.4 (LINN, syn.!) & illustration of Convolvulus major. .. in Sloane, Jam. Nat. Hist., t. 96 fig. 2 (1707) (syn.!)
Ipomoea tuberosa L. [family CONVOLVULACEAE], Sp. Pl. : 160 (1753)
Ipomoea mendesii Welw. [family CONVOLVULACEAE], Apont. : 584 (1859). Type : Angola, Loanda, Welwitsch 6254 (BM, iso.!)
Operculina tuberosa (L.) Meisn. [family CONVOLVULACEAE], in Mart., Fl. Brasil. 7 : 212 (1869)
Merremia kentrocaulos [family CONVOLVULACEAE], sensu T.T.C.L. : 172 (1949), non (C.B.Cl.) Rendle (1905) ]
Information
A glabrous perennial twiner or liane; stems smooth, from a large subterranean tuber, robust, terete and finely striate. Leaf-blade orbicular in outline, 6–16 cm. long and broad, palmately divided to near the base; lobes 7, oblong-lanceolate or oblanceolate, up to 8 cm. long and 3.3 cm. wide, acuminate at the apex, narrowed below, entire; petiole 6–18 cm. long. Peduncle axillary, few- to several-flowered, 4–15 cm. long; pedicels 1.5– 1.8 cm. long, enlarging in fruit to 5 cm. Outer sepals ovate, obtuse, mucronate, 2.3–3 cm. long, 1.2–1.8 cm. wide; inner narrower, oblong, 2.1–2.5 cm. long; all sepals enlarging in fruit and becoming about 5–6 cm. long. Corolla yellow, funnel-shaped with a more or less cylindrical tube, 4.0–5.5 cm. long, 5–6 cm. wide, glabrous. Capsule ellipsoid to globose, enclosed in the sepals, about 3.5 cm. in diameter, splitting irregularly and also separating about the base. Seeds black, pubescent, about 1.7 cm. long.
Range
DISTR. U4; K7; T3 ; a native of tropical America—elsewhere cultivated and often naturalized
Distribution
KENYA Teita District Mackinnon Road, 10 Sept. 1957, Verdcourt 1862B !TANGANYIKA Lushoto District Amani, 26 Mar. 1930, Greenway 2217 ! & 23 May 1905, Braun in A.H. 708 !UGANDA Mengo District Entebbe Botanic Garden, June 1935, Chandler 1216 !
Distribution (external)
Mozambique
Angola
Mascarene Is
India
Ceylon
Malaysia

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