Ipomoea caudata Fernald

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

284. Ipomoea caudata Fernald , Proc. Amer. Acad. Arts 36: 498. 1901. (Fernald 1901: 498)

Ipomoea hintonii L. O. Williams , Econ Bot. 24: 400. 1970. (Williams 1970b: 400). Type. MEXICO. Est. México, Nanchititla, G.B. Hinton et al. 8474 (holotype F0054847, isotypes LL, MO, NY, US).

Type.

MEXICO. Morelos, Sierra de Tepoxtlán, C.G. Pringle 8448 (holotype GH00054487, isotypes AC, BM, CM, DAO, E, ENCB, F, GOET, ISC, K, M, MEXU, MICH, MIN, MSC, MO, NDG, NY, P, PH, RM, RSA, S, UC, US, VT).

Description.

Slender, probably twining perennial herb, stems glabrous, reaching 3 m. Leaves petiolate, 4-11 × 1-4.5 cm, narrowly ovate, long acuminate to a fine mucronulate point, base sagittate with acute, apiculate auricles, both surfaces glabrous, abaxially somewhat reticulate and somewhat glaucous; petioles 1.5-6.5 cm. Inflorescence of solitary (rarely in 2-3-flowered cymes) pedunculate flowers; peduncles 8-12 cm; bracteoles 1 mm, squamose, caducous; pedicels 18-30 mm; sepals very unequal, outer 3-6 × 3-4 mm, ovate, obtuse, scarious-margined, dotted with conspicuous dark glands, inner 8-11 mm, broadly oblong, retuse, mostly scarious except at base; corolla 3.5-5 cm long, salverform with a basal tube c. 4 cm long, pink, glabrous, limb short, c. 2 cm diam., stamens exserted. Capsules and seeds unknown.

Illustration.

McDonald (1987c: 85).

Distribution.

Endemic to seasonally upland pine and oak woodland in central Mexico.

MEXICO. Est. México & Dist. Fed.: type of Ipomoea hintonii . Morelos: Sierra de Tepoxtlán, C.G. Pringle 13590 (GH, S); Tlayacapan, Barranca Tepecapa, R. Hernández-Cárdenas et al. 522 (IEB); Tepozteco, E. Lyonnet 540800007 (IEB); J. Espinosa 79 (MEXU).

Note.

Close to Ipomoea simulans and I. miquihuanensis differing in the narrow corolla tube and exserted stamens.