Ipomoea schaffneri S. Watson

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

302. Ipomoea schaffneri S. Watson , Proc. Amer. Acad. Arts 18: 123. 1883. (Watson 1883: 123)

Type.

MEXICO. San Luis de Potosí, J.W. Schaffner 621 (holotype GH00054541, isotypes K, MEXU).

Description.

Trailing or climbing herb, stems thinly pilose. Leaves shortly petiolate, 2.5-4.5 × 2-4.5 cm, broadly ovate to suborbicular, base broadly cordate and cuneate onto the petiole, apex shortly acuminate, mucronulate, margin irregularly sinuate to coarsely dentate, thinly adpressed pilose on both surfaces, especially on the veins; petioles 1-3 cm. Inflorescence of solitary, pedunculate flowers; peduncles 1.5 -3 cm; bracteoles 3-7 mm, lanceolate, semi-persistent; pedicels 5-18 mm, noticeably stouter than peduncles; sepals slightly unequal, outer 8-12 × 3-4 mm, ovate, acute, thinly pilose, the margins scarious, inner similar but 1-2 mm longer, mucronate and with fewer hairs; corolla 5-6 cm long, narrowly funnel-shaped, pale pink, glabrous; stamens held at corolla mouth. Capsules conical, c. 10 mm long; seeds 6 × 5 mm, brown, puberulent.

Illustration.

McDonald (1987c: 86).

Distribution.

Endemic to north east Mexico, apparently only known from the type.

MEXICO. San Luis de Potosí: type collection.