275. Ipomoea jacalana Matuda, Anales Inst. Biol. Univ. Nac. México 35: 58. 1965. (Matuda 1965: 58)

Type.

MEXICO. Hidalgo, Cumbre de Jacala, E. Matuda 37288 (holotype MEXU00050769).

Description.

Trailing or climbing plant, stems finely pilose, glabrescent. Leaves petiolate, 4-9 × 2.5-7 cm, ovate-deltoid, obtuse, base cordate and then cuneate onto the petiole with distinct rounded auricles, margin irregularly dentate, both surfaces green, abaxially paler, strongly reticulate, veins pubescent; petioles 2-5 cm. Inflorescence of 1-3 flowered, axillary cymes; peduncles 10-15 cm; bracteoles 1-4.5 × 0.5-3.5 cm, ovate, petiolate, dentate, resembling small leaves; pedicels 14-22 mm, tickened upwards, pubescent; sepals subequal, 15-17 × 6 mm, narrowly oblong-elliptic, acuminate, margin scarious, outer sepals pubescent, glabrescent; corolla 5.5-6.5 cm long, funnel-shaped, pinkish-purple with paler tube, glabrous, limb c. 3 cm diam. Capsules and seed unknown.

Distribution.

Endemic to Hidalgo in Mexico and only known from the type.

MEXICO. Hidalgo: type collection.

Note.

The leaf shape suggests this species is intermediate between Ipomoea stans and another species, perhaps I. orizabensis . The foliose bracteoles and dentate leaves are distinctive characters.