331. Ipomoea perpartita McPherson, Contr. Univ. Michigan Herb. 14: 94. 1980. (McPherson 1980: 94)

Type.

MEXICO. Jalisco, Cabo Corrientes, R. McVaugh 26371 (holotype MICH1111343).

Description.

Twining herb to 3 m, stems glabrous, woody. Leaves shortly petiolate, 0.5-2 × 0.7-2.5 cm, palmately divided into 5-7 segments, the segments with 1-3 pinnately arranged lateral lobes, all linear, acute, glabrous; petioles short, 2-12 mm, pseudo-stipules present at base. Inflorescence of 1-2-flowered, pedunculate, axillary cymes; peduncles 2-5.5 cm; bracteoles 1-3 mm, lanceolate; pedicels 8-12 mm, noticeably thicker than peduncle; sepals unequal, oblong-ovate, mucronate, glabrous, margins whitish, outermost 3.5-5 × 2.5 mm, inner 6-7.5 mm; corolla 3-4 cm long, funnel-shaped, white with purple tube, glabrous, limb 2.5 cm diam. Capsules glabrous, 6-7 mm long; seeds 3 × 1.5 mm, minutely pubescent.

Illustration.

McPherson (1980: 95).

Distribution.

Endemic to Jalisco in central Mexico.

MEXICO. Jalisco: 18 km W of San Sebastián, Cochrane et al. 12053 (A, IEB, WIS); Cabo Corrientes, E. Carranza et al. 6133 (IEB).

Note.

Like Ipomoea cairica and I. quamoclit, this species has pseudo-stipules at the base of the petiole. It is also distinguished by the bipinnatisect leaf segments.