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 178. Ipomoea heterodoxa Standl. & Steyerm. , Publ. Field Mus. Nat. Hist. , Bot. Ser. 23 : 82. 1944. (Standley and Steyermark 1944: 82) Type. BELIZE. Maskall, P. Gentle 871 (holotype F0054844, isotype S). Description. Twining perennial or small liana to c. 4 m, stems glabrous, somewhat woody. Leaves petiolate, palmately divided into 5-7 lobes, the lateral 4 lobes sessile to shortly petiolate, the terminal lobe pedately trilobed, lobes 2-7 x 0.5-1.8 cm, oblong-oblanceolate, obtuse to subacute, glabrous, abaxially paler; petioles 3-5 cm. Inflorescence of shortly pedunculate, cluster-like cymes, the cymes often paired; peduncles 0-12 mm; secondary peduncles 2-4 mm; bracteoles early caducous, not seen; pedicels 6-9 mm; sepals subequal, rigid and somewhat convex, glabrous, the margins scarious, outer 4-5 x 4 mm, obovate-elliptic, obtuse, inner sepals 5 x 5 mm, rounded to retuse; corolla 3-3.5 cm, funnel-shaped, white with pink-flushed limb, glabrous, gradually widened from base, tube whitish-green; limb c. 2 cm diam. Capsules 7 x 4-5 mm, ovoid, rostrate, glabrous, the mucro 2-3 mm long; seeds 5-7 mm long, pilose with white marginal hairs. Illustration. Figure 7D . Distribution. Endemic to Central America in dry forest at very low altitudes. GUATEMALA. Peten , P.N. Tikal, R. Tun Ortiz 364; ibid., 440 (BM, MO); ibid., E. Contreras 367 (F, MO, XAL); Lago Peten Itza , B. Wallnoefer 9506 (K, MO, W). BELIZE. Stann Creek, G.R. Proctor 35804 (BM); ibid., W.A. Schipp 846 (BM, K, S); Cayo, Chaa Creek Trails, M.J. Balick et al. 3171 (NY, OXF). MEXICO. Campeche : Calakmul, Puente El Papagayo, E. Martinez et al. 31814 (BM, MEXU); ibid., Narciso Mendoza, D. Alvarez 544 (BM, MEXU). Chiapas : Ocosingo, E. Martinez 15974 (MO). Quintana Roo : Laguna Ocum, E. Cabrera 293 (BM, MEXU): Felipe Carillo Puerto, E.F. Cabrera & L. Cortez 396 (BM, MEXU). Tabasco : Balancan, A. Novelo et al. 115 (K, MEXU). Yucatan : Merida , A. Schott 589 (BM); Izamal, G.F. Gaumer 989 (BM, K, S); Valadolid, Xuilub, B. Morgensen 1182 (AAU, K, MO). Note. The palmately lobed leaves and shortly pedunculate cymes distinguish this species. The distribution in Fl. Mesoamericana 4(2): 332 is completely wrong.