Ipomoea stuckertii O'Donell

Wood, John R. I., Munoz-Rodriguez, Pablo, Williams, Bethany R. M. & Scotland, Robert W., 2020, A foundation monograph of Ipomoea (Convolvulaceae) in the New World, PhytoKeys 143, pp. 1-823 : 1

1. Ipomoea stuckertii O'Donell , Lilloa 14: 188. 1948. ( O’Donell 1948a: 188)

Type.

ARGENTINA. Córdoba, Dept. Tulumba, B. Balegno 1199 (lectotype LIL001355, designated here; isolectotype LIL).

Description.

Perennial with napiform rootstock and usually trailing, rarely twining, lanate stems, which become sparsely pilose when old. Leaves petiolate, 2.5-11 × 2.5-8 cm, deeply palmatisect with 6-9 narrowly elliptic to oblanceolate crenate acute lobes, both surfaces tomentose to thinly pilose, base cuneate; petioles 2.5-4 cm, white-pubescent. Flowers 1-3 in axillary, pedunculate cymes; peduncles 7-18 mm, pubescent; bracteoles deltoid. 2-3 mm long, caducous; pedicels 2-10 mm, pubescent; sepals subequal, 8-11 × 4-6 mm, oblong-elliptic, obtuse, white-pubescent, the inner with glabrous margins; corolla 3.5-6 cm long, funnel-shaped, pink, glabrous or with a few short hairs in bud, limb c. 2.5 cm diam. Capsules 15 × 15 mm, subglobose, rostrate; seeds 7-8 mm, long-pilose.

Illustration.

O’Donell (1959b: 143).

Distribution.

Endemic to the sub-Andean region of NW Argentina, growing on rocky mountains at around 1000 m, apparently most common in Córdoba.

ARGENTINA. Catamarca: La Paz, J. Brizuela 108 (P). Córdoba: sine data, E. Fielding (BM); camino de Carlos Paz a Pampa de Achala, 12 km antes de Copina, A.L. Pastore 367 (P, SI, US); Copina, A. Burkart 7460 (SI); San Alberto, T. Stuckert 10762 (CORD). San Luis: Ayacucho, Ruta 146 a S de Luján, R. Kiesling 4736 (SI); C. Galander s.n. [15/3/1882] (CORD). Santiago del Estero: Choya, A.T. Hunziker & A.E. Cucucci 17909 (CORD).

Note.

The palmatisect leaves, lanate stems and pubescent sepals are distinctive.