A foundation monograph of Ipomoea (Convolvulaceae) in the New World Author Wood, John R. I. Author Munoz-Rodriguez, Pablo Author Williams, Bethany R. M. Author Scotland, Robert W. text PhytoKeys 2020 143 1 823 http://dx.doi.org/10.3897/phytokeys.143.32821 journal article http://dx.doi.org/10.3897/phytokeys.143.32821 1314-2003-143-1 F6F11A6EE4FF5A1885CEA2B60AE965A5 250. Ipomoea mairetii Choisy in A.P. de Candolle , Prodr. 9 : 374. 1845. (Choisy 1845: 374) Calonyction venustum M. Martens & Galeotti, Bull. Acad. Roy. Sci , Bruxelles 12 (2): 270. 1845. (Martens and Galeotti 1845: 270). Type. MEXICO. Tabasco, J.J. Linden 306 (holotype GENT n.v., isotype BR000006973339). Ipomoea venusta (M. Martens & Galeotti) Hemsl. ex Godman & Salvin, Biol. Cent.-Amer. , Bot. 2 (11): 395. 1882. (Hemsley 1882: 395). Type. MEXICO. Mairet s.n. (holotype G-DC, not found). Description. Climbing or trailing liana to 7 m, stems stout, densely hirsute. Leaves petiolate, 8-20 x 7.5-16 cm, large, ovate-suborbicular, shortly acuminate, cordate with rounded auricles, adaxially thinly pubescent to strigose, abaxially densely grey-tomentose; petioles 2.5-4 cm densely pubescent. Inflorescence of few-flowered long-pedunculate axillary cymes; peduncles 1.5-20 cm, tomentose; bracteoles 2-3 x 0.5-1.5 cm, ovate to narrowly elliptic, obtuse, pubescent, persistent; secondary peduncles 0.5-3 cm; pedicels 5-15 mm, tomentose; sepals equal, 16-22 x 7-11 mm, oblong-ovate, tomentellous, obtuse, somewhat accrescent in fruit; corolla 4-5.5 cm long, pubescent, narrowly funnel-shaped, tube white, limb reddish purple, 5-6 cm diam.; stigma 3-lobed. Capsules subglobose, 1.2-1.5 cm, glabrous, six-seeded; seeds 5-7 mm, minutely puberulent. Illustration. McDonald (1994: 71). Distribution. Dry oak woodland below 1600 m from central Mexico south to Honduras. HONDURAS. Comayagua, A. & A.R. Molina 34235 (MO). GUATEMALA. Chimaltenango, P.C. Standley 80879 (F). MEXICO. Chiapas : Matuda 18471 (MEXU); Santa Rosa, Heyde & Lux 4350 (K). Durango : Hendricks 695 (MO). Guerrero : Mun. San Luis Acatlan , E. M. Martinez & B. Morales 3470 (MO); Mochitlan , Agua de Obispo, H. Kruse 963 (IEB). Michoacan : Chinicuila, I.G. Hernandez s.n. [7/3/2009] (IEB). Nayarit : Mesa del Nayar, O. Tellez et al. 12138 (MO). Oaxaca : Putla de Guerrero, T. Croat 45854 (MO); Sierra San Pedro C. Juergensen 551 (BM, K, OXF); Cafetal Concordia, Morton & Makrinius 2507 (US, MICH); San Miguel del Puerto, Rancho Oreeja de Leon , J. Pascual 2022 (IEB). Sinaloa : Ocarahui, Sierra Surutato, H.S. Gentry 6250 (ARIZ, MO). Veracruz : Hahn s.n. (P); Valle de Cordoba , Bourgeau 1738 (BM, K, P, S); Mirador, J. Linden 1119 (K); Orizaba, J. Ball s.n. (K); Zacualpan, C.A. Purpus 2391 (BM, MO). Note. Not unlike Ipomoea temascaltepecensis but more hirsute generally, the leaves tomentose beneath and sepals subequal.