313. Ipomoea fissifolia (McPherson) Eckenw., Brittonia 41: 79. 1989. (Eckenwalder 1989: 79)

Quamoclit fissifolia McPherson, Contr. Univ. Mich. Herb. 14: 97. 1980 (McPherson 1980: 97). Type. MEXICO. Michoacán, west of Aguililla, R. McVaugh 24694 (holotype MICH1163198).

Type.

Based on Quamoclit fissifolia McPherson

Description.

Woody liana, 4-6 m long, stems glabrous. Leaves petiolate, 2-14 × 2-14 cm, deeply palmately and subpedately lobed nearly to the base, the lobes usually 5-9, 2-9 × 0.1-1.4 cm, linear to lanceolate, narrowed at both ends, entire, glabrous; petioles 2.8-10 cm. Inflorescence of long-pedunculate, many-flowered axillary cymes; peduncles 20-50 cm long; bracteoles 1-1.5 mm, deltoid, mucronate; secondary and tertiary peduncles 1-1.5 cm; pedicels 10-40 mm; sepals unequal, ovate to suborbicular, obtuse or retuse, carinate, glabrous, outer 2.5-3.5 mm with 1-3 mm long awn, inner 4.5-6 mm with 2-5 mm long awn; corolla, greenish-red, glabrous, hypocrateriform with a curved tube 2.5-3 cm long, the limb c. 3 cm diam., lobed with lobes ovate, 9-12 mm long; stamens and style exserted. Capsules ovoid, 8-10 mm long, glabrous, muticous; seeds shortly pubescent.

Illustration.

McPherson (1980: 96).

Distribution.

On limestone rocks at 1400-1450 m in central Mexico. Only known from the type.

MEXICO. Michoacán: the type collection.

Note.

The deeply palmately divided leaves with up to 7 leaflets are very distinct.