Ipomoea simulans D. Hanb.

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

282. Ipomoea simulans D. Hanb. , J. Linn. Soc. Bot. 11: 281. 1871. (Hanbury 1871: 281)

Type.

Cultivated plant from MEXICO, Guanajuato, Sierra Gorda near San Luis de la Paz, Finck s.n. (lectotype K000612720, designated by McDonald 1987c: 62, isolectotype BM).

Description.

Slender twining perennial herb, stems glabrous, roots reported to be tuberous. Leaves petiolate, 4.5-11 × 1.5-6 cm, ovate, cordate, the auricles sometimes incurved and almost touching, apex acuminate, both surfaces glabrous; petioles 2-6.5 cm. Inflorescence of solitary (or paired) pedunculate, axillary flowers; peduncles 2-6 cm, sometimes arising through the leaf sinus, commonly flexuose; bracteoles 2 mm, oblong-lanceolate; pedicels 7-15 mm, distinctly thicker than the peduncles; sepals slightly unequal, ovate to ovate-oblong, obtuse to rounded, glabrous, the margins scarious, abaxial surface with dark spots, outer 4-6 × 5 mm, inner 6-8 × 5-6 mm; corolla 2.5-4.5 cm long, shortly funnel-shaped and flared from the base, blue (?) drying purple, glabrous, limb 2-4 cm diam. Capsules 9 × 6-7 mm, ovoid, rostrate, glabrous; seeds up to 4, 5 × 3-4 mm, glabrous.

Illustration.

McDonald (1987c: 85).

Distribution.

Endemic to central Mexico at altitudes of 1500-2500 m.

MEXICO. Est. México & Dist. Fed.: Temascaltepec, G.B. Hinton 8348 (GBH, K). Hidalgo: A. Villa Kamel 91 (IEB). Michoacán: Morelia, N of Zapote, G. Arsène s.n. [4/8/1910] (P). Morelos: Cuernavaca, C.G. Pringle 6565 (BM, GH, K, MO, S, US); Huitzilac, J. Vásquez 2300 (MEXU). Oaxaca: Cerro San Felipe, C. Conzatti 4174 (US); Santiago Textitlán, A. Zarate Marcos 683 (MEXU). Querétaro: Pinal de Amoles, E. Carranza & E. Pérez 5415 (IEB, MEXU); ibid., S. Zamudio & E. Carranza 6850 (IEB); Landa de Matamoros, B. Servín 1291 (IEB). San Luis Potosí: Xilitla, E. Carranza & S. Zamudio 5933 (IEB).

Notes.

Rather similar to Ipomoea dumetorum but perennial with tuberous roots and a larger corolla reaching 4.5 cm in length. The leaves are also more strongly sagittate.

This is the source of "Tampico Jalap".