Ipomoea chamelana

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

329. Ipomoea chamelana J.A. McDonald, Biótica 12 (3): 217. 1987. (McDonald 1987a: 217)

Type.

MEXICO. Jalisco, La Huerta, Arroyo Colorado, cerca de los Pozos, Est. Biologica Chamela, E.J. Lott 729 (holotype MEXU00448375, isotypes MO, US, XAL).

Description.

Annual herb with slender twining glabrous stems. Leaves small, palmately divided into 6-10 linear, acute segments, apparently one central lobe and various secondary lobes arising on the two lateral lobes, glabrous. Inflorescence of solitary, axillary, pedunculate flowers; peduncles slender 0.7-2.5 cm; bracteoles 1 mm, deltoid, sessile, scarious; pedicels 6-12 mm, distinctly thicker than the peduncles; sepals slightly unequal, outer 4-5 × 1 mm, lanceolate, finally acuminate and apiculate, muricate along the midrib, glabrous, margins scarious, inner 6 mm long, abaxially smooth, the apex obtuse and apiculate; corolla 1.7-2.5 cm long, subcampanulate, yellow, glabrous, the midpetaline bands ending in a point. Capsules subglobose, glabrous; seeds black, glabrous or minutely puberulent.

Illustration.

McDonald (1987a: 218).

Distribution.

Endemic to Mexico and apparently restricted to the area around La Huerta in Jalisco at low altitudes.

MEXICO. Jalisco: G. Ayala 985 (K, MEXU), Rothschild & Phillips 058 (K); Los Conejos-Llano Grande, T.S. Cochrane et al. 11996 (IEB).