Ipomoea populina House

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

118. Ipomoea populina House , Ann. New York Acad. Sci. 18: 226. 1908. (House 1908b: 226)

Type.

MEXICO. Guerrero, E. Palmer 482 (holotype US00111446; isotypes K, GH, NY, UC, US).

Description.

Climbing or trailing liana to at least 4 m, stems glabrous or pubescent. Leaves petiolate, 4.5-13 × 3-9 cm, narrowly ovate, acuminate, base truncate to weakly cordate, usually abaxially pubescent at base of midvein; petioles 2.5-5 cm. Inflorescence of terminal and axillary 1-5-flowered cymes borne on short branchlets; peduncles 0.5-2.5 cm, glabrous or pubescent; bracteoles ovate-deltoid, 2-4 × 1-1.5 mm; pedicels 1.5-3.5 cm, glabrous or pubescent; sepals subequal, 5.5-12 × 6-9 mm, ovate to suborbicular, acute or obtuse, abaxially glabrous or pubescent; adaxially pubescent with bulbous-based hairs; corolla 5.5-8 cm long, funnel-shaped, sparsely pubescent on the midpetaline bands (rarely glabrous), limb 7-10 cm diam.; stamens 10-13 mm, stigmas cylindrical. Capsules ellipsoid, 15-25 mm long; seeds long-pilose on the margins.

Distribution.

In scattered localities from southern Mexico south to Nicaragua.

N ICARAGUA. Estelí, Mun. Condega, P. Moreno 25330 (BM); Madriz, Cerro Quisaca, W.D. Stevens et al. 27620 (MO).

EL SALVADOR. Santa Ana, P.N. Montecristo, V.M. Martínez 500 (BM).

HONDURAS. Morazán, A. Molina 18464 (BM, NY).

GUATEMALA. W. Popenoe 360a (BM); Zacapa, Río Hondo, L.O. Williams et al. 41887 (BM, F, MO, NY); Baja Verapaz, Salamá, J.M. Christenhusz et al. 5666 (BM).

MEXICO. Chiapas: Cintalapa, A. Reyes Garcia et al. 1463 (BM, MO); 30 km from Tuxtla Gutiérrez towards San Cristóbal, P.J. Stafford et al. 236 (BM). Guerrero: Langlassé 612 (F, K, P, US); Montes de Oca, G.B. Hinton et al. 11528 (K, MICH, NY, US); Zoyatepec, E.M. Martínez & B. Morales 3404 (MEXU). Oaxaca: Juchitán, Arroyo Chivela, E. Pérez Garcia 1743 (MO); Buenavista, Cerro Guiengola, L. Torres 734 (MEXU); Pochutla, M. Elorsa 6323 (MEXU). Puebla: Caltepec, P. Tenorio 7268 (MEXU).

Note.

Very similar to Ipomoea wolcottiana differing principally in its climbing or prostrate (not tree-like) habit. The pubescent buds are a useful character. Herbarium specimens can be difficult to distinguish from Ipomoea wolcottiana .