Ipomoea jujuyensis O'Donell

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

Type

Type: Argentina, Jujuy, Lagunas de Yala, O’Donell 4835 (holotype LIL 182934!).

Morphology General Habit

Twining perennial to 6 m from a tuberous rootstock, stems pubescent to subhispid

Morphology Leaves

Leaves petiolate, 5 – 15 × 3.5 – 9 cm, ovate, shortly acuminate, cordate with rounded auricles, thinly adpressed pubescent; petioles 2 – 10 cm, pubescent

Morphology Reproductive morphology Inflorescences

Inflorescence of pedunculate axillary cymes with up to five flowers; peduncle 5 – 15 cm, pubescent, stout; bracteoles 2 – 3 mm long, broadly lanceolate, caducous; pedicels 1 – 2.5 cm, thickened upwards, stout, pubescent, often deflexed at maturity; sepals slightly unequal, rounded and emarginate, usually mucronulate, the margins scarious, outer 6 – 8 × 5 – 6 mm, elliptic, obtuse, thinly pubescent, inner 7 – 8 × 8 – 9 mm, suborbicular, glabrous; corolla 6.5 – 9 cm, funnel-shaped from a short basal tube, violet, glabrous, limb 4.5 – 6 cm diam., undulate

Morphology Reproductive morphology Fruits

Capsule ovoid, rostrate, glabrous, seeds tomentellous.

Ecology

Scattered from Ecuador to northern Argentina, this is a rare but possibly overlooked species in Bolivia growing at low altitudes in the Andes of La Paz.

Conservation

Data deficient (DD).

Note

Collected in flower in September.

Molecular studies indicate this species is related to Ipomoea dumetorum, with which it shares a strongly rostrate capsule, scarious-margined sepals and minutely tomentellous seeds. It is easily distinguished, however, by the perennial habit, larger corolla and absence of dark spots on the sepals. It is most likely to be confused with I. tarijensis but can be distinguished by the denser indumentum, longer stamens, deflexed fruiting pedicels and other characters provided under I. tarijensis.