Ipomoea lobata (Cerv.) Thell.

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution

Cultivada en Colombia; Alt. 1550 - 1800 m.; Andes.

Morphology General Habit

Trepadora

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation

Predicted extinction risk: threatened. Confidence: confident

Wood, J.R.I., Carine, M.A., Harris, D. et al. 2015. Ipomoea (Convolvulaceae) in Bolivia. Kew Bulletin 70: 31. DOI https://doi.org/10.1007/s12225-015-9592-7

Morphology General Habit

Annual twining herb, stem usually glabrous

Morphology Leaves

Leaves petiolate, 3 – 12 × 2.5 – 10 cm, ovate or, more commonly 3-lobed to about half way, base cordate with rounded auricles, apex shortly acuminate, obtuse and mucronate, near glabrous but sometimes puberulent on the veins beneath, abaxially paler; petioles 2 – 5 cm

Morphology Reproductive morphology Inflorescences

Inflorescence of long-pedunculate axillary cymes appearing to form an elongate bifurcate raceme; peduncles (5 –) 10 – 16 (– 30) cm; rhachis above branching point, (2 –) 8 – 12 cm; bracteoles 1 – 2 mm, linear-lanceolate, moderately persistent; pedicels slender, 2 – 6 mm, longer below; sepals dissimilar, glabrous or, occasionally, thinly pilose, outer oblong-ovate, 2 – 3 × 1.5 mm with terminal awn 2 – 4 mm long, inner sepals with broader base, elliptic, 3 – 3.5 × 2 mm and awn 2 – 4 mm long; corolla tubular, curved, suburceolate, 1.8 – 2.5 cm long, yellow, red or orange, limb formed of 5 small tooth-like lobes; stamens strongly exserted; style exserted

Morphology Reproductive morphology Fruits

Capsules subglobose, 7 mm diam., glabrous; seeds 4 mm long, pubescent with hairs in patches.

Ecology

This species is probably of Mexican origin but is widely cultivated and occasionally naturalised in the Americas.

Conservation

Not evaluated. It only occurs in cultivation or as an escape.

Note

Found in flower in November. Quite unlike other species of Ipomoea on account of its raceme-like inflorescence combined with aristate sepals and tubular corolla, the limb replaced with five teeth.

Convolvulaceae, B. Verdcourt (East African Herbarium). Flora of Tropical East Africa. 1963

Morphology General Habit

Perennial glabrous twiner; stems slender, up to 5 m. long.

Morphology Leaves

Leaf-blade broadly ovate to reniform in outline, 6–15 cm. long and wide, with a deep sinus at the base, entire or 3-lobed; central lobe elliptic, acuminate, entire or remotely toothed; lateral lobes subovate, often lobed or with coarse teeth; petiole 3–13 cm. long.

Morphology Reproductive morphology Inflorescences

Inflorescences up to 15 cm. long; peduncles up to 20 cm. long.

Morphology Reproductive morphology Flowers Calyx

Sepals 2–4 mm. long, with an awn 2–3 mm. long.

Morphology Reproductive morphology Flowers Corolla

Corolla red, later becoming whitish or pale yellow; narrow tubular part 4 mm. long, 1.5 mm. wide; upper part 17–20 mm. long; teeth mucronulate.

Morphology Reproductive morphology Flowers Androecium Stamen and Style

Stamens and style finally twice as long as the corolla.

Morphology Reproductive morphology Fruits

Capsule glabrous, ovoid, 6–8 mm. long.

Figures

Fig. 18, p. 67.

Habitat

Naturalized in lowland rain-forest; 870 m.

Distribution

Mexico to South Americawidely cultivated in the tropics and occasionally seen as an escape (Greenway) T3

Convolvulaceae, Maria Leonor Gonçalves. Flora Zambesiaca 8:1. 1987

Morphology General Habit

Perennial glabrous twiner.

Morphology Stem

Stems slender, terete up to 5 m. long.

Morphology Leaves

Leaf lamina broadly ovate to reniform, 6–15 cm. long and wide, with a deep sinus at the base, entire or 3-lobed; central lobe elliptic, acuminate, entire or remotely toothed; lateral lobes subovate, often lobed or with coarse teeth; petiole 3–10 cm. long.

Morphology Reproductive morphology Inflorescences

Inflorescences up to 15 cm. long; peduncles up to 20 cm. long.

Morphology Reproductive morphology Flowers Calyx

Sepals 2–4 mm. long, with an awn 2–3 mm. long.

Morphology Reproductive morphology Flowers Corolla

Corolla red, later becoming whitish or pale yellow; narrow tubular part about 5 mm. long; upper part 17–20 mm. long; teeth mucronulate.

Morphology Reproductive morphology

Stamens and style finally twice as long as the corolla; filaments pubescent towards the base.

Morphology Reproductive morphology Flowers Disc

Disk shallowly 5-lobed.

Morphology Reproductive morphology Fruits

Capsule ovoid, glabrous.