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 180. Ipomoea conzattii Greenm. , Publ. Field Columb. Mus. , Bot. Ser. 2 (6): 258. 1907. (Greenman 1907: 258) Exogonium conzattii (Grenm.) House , Bull. Torrey Bot. Club 35 : 102. 1908. (House 1908a: 102). Type. MEXICO. Oaxaca, Almoloyas, C. Conzatti 1666 (holotype F0054836, isotypes MEXU, VT). Description. Twining liana; stems woody with grey bark, white canescent when young. Leaves absent at anthesis, petiolate, 1.5-10 x 1-6.5 cm, ovate-deltoid, subrhomboid, panduriform or shallowly 3 -lobed, margin undulate, apex acute, obtuse or retuse, mucronate, base truncate and cuneate onto the petiole, pubescent on both surfaces, abaxially paler; petioles 0.5-6 cm, pubescent. Inflorescence of very shortly pedunculate compact corymbs; peduncle 0.3-2.8 cm, sericeous; bracteoles 2-3 mm, ovate-deltoid, sericeous, caducous; secondary peduncles 1-5 mm; pedicels 12-15 mm, thickened upwards, canescent; sepals slightly unequal, outer 5-7 x 3-6 mm, elliptic, obtuse, densely pubescent to canescent, greenish, inner sepals obovate, rounded, pubescent in the centre but with broad glabrous scarious margins; corolla 3-4.5 cm long, cylindrical-hypocrateriform, deep pink, glabrous or with a few hairs, somewhat rugose, limb 2-3 cm diam., lobed, stamens exserted. Capsules ellipsoid, 9 x 6-8 mm, glabrous: seeds 6 x 3 mm, pilose on margins with long white hairs c. 7 mm long. Distribution. Endemic to central Mexico, growing around 1200 to 2200 m in dry deciduous woodland and scrub; apparently uncommon. MEXICO. Est. Mexico & Dist. Fed. : El Zapote, S. Zamudio 10995 (IEB, MEXU); Villa Guerrero, E. Matuda et al. 28029 (MEXU). Guerrero : Cerro Xilotzin, E. Moreno-G 871 (MEXU). Morelos : Xochicalco, Hahn s.n. (P); Cuautla, Sierra de Topotzlan , D.H. Lorence 5021 (MEXU, MO); Tezoyuca-E. Zapata, J. Vasquez 252 (MEXU); Cuernavaca, E. Fournier s.n. [1866] (P); E. Lyonnet 550400015 (IEB, MEXU). Oaxaca : Almolayas, C. Conzatti 1950 (F); Cuicatlan, J.I. Calzada 23880 (K, MEXU). Puebla : Tehuacan , C.A. Purpus 5833 (BM, MO); ibid., H.S. Gentry 23385 (ARIZ, DES, MEXU); Cuicatlan , G.A. Salazar et al . 9383 (MEXU); Caltepec, P. Tenorio & C. Romero 5100 (MEXU); R. Razo & R. Garcia III-39 (IEB). Veracruz : Long & Burch 3278 (F); Acutzingo, J.E. Rivera 5451 (MEXU). Note. Distinguished from related species by the relatively broad corolla limb, near glabrous corolla but canescent sepals and pedicels.