Ipomoea tenuirostris subsp. tenuirostris

tenuirostris : with a slender beak; possibly referring to the long and narrow apex of the calyx lobes.

Perennial herb with trailing or twining stems up to 3 m long. Stems more or less densely covered with spreading yellowish hairs. Leaves ovate to oblong, 4-12 cm long, more or less densely hairy on both surfaces, cordate at the base; apex pointed; margin entire but wavy; petiole 2.5-8.5 cm long, hairy. Inflorescences laxly several-flowerd, peduncle much longer than pedicels; bracts lanceolate, c. 3 mm long. Sepals ovate-lanceolate, 7-12 mm long with a long narrow apical tip, yellowish hairy. Corolla funnel-shaped, 2-4 cm long, white, mauve or purple, often darker purple on the midpetaline areas. Capsule globose, hairless, tipped with the persistent style base.

Cameroun, DRC, Uganda, Sudan, Ethiopia, Kenya, Tanzania, Malawi, Mozambique, Zambia and Zimbabwe.