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 377. Ipomoea pantanalensis J.R.I. Wood & C. Urbanetz , Kew Bull. 71 (6): 2. 2016. (Wood et al. 2016a: 2) Type. BRAZIL. Mato Grosso do Sul, Mun. Corumba , Fazenda Nhumirim, caminho para o Caronal, Nhecolandia, 90 m, 18°59'S , 56°39'W , 31 Jan. 1990, A. Pott & O.C. de Souza 5475 (holotype CPAP, isotypes MBM, SP). Description. Slender herb, probably perennial; stems sometimes creeping and rooting at the nodes, sometimes ascending and twining up to c. 30 cm, glabrous. Leaves petiolate, sometimes dimorphic; petioles 0.8-3 cm, glabrous or with a few scattered hairs; lamina glabrous or thinly pubescent, abaxially pale green, base cuneate, occasionally ovate-deltoid, 1 -5.6 x 1.7-4.5 cm, acute, more commonly digitately 3-5-lobed to near the base with lobes 1-4.8 x 0.1-0.6 cm, linear or lanceolate, acute. Inflorescence of solitary axillary flowers; peduncles 1-3 cm; bracteoles persistent, 4 x 0.5 mm, ciliate; pedicels 1-3 cm, often dark red, thinly pilose; sepals very unequal, outer sepals 15-24 x 3-6 mm, deltoid, acute to shortly mucronate, base truncate with a simple or notched lateral tooth, margin ciliate, inner sepals 10-18 x 3-4 mm, similar in shape but lacking the distinct lateral teeth, abaxially pubescent in the central area, margins glabrous; corolla 3.8-5.5 cm long, pink, funnel-shaped, glabrous; limb c. 2.5 cm diam., the lobes apiculate; stamens included; ovary glabrous. Capsules and seeds not seen. Illustration. Figures 3F , 182 . Figure 182. Ipomoea pantanalensis . A habit B peduncle with bracteoles C outer sepal D inner sepal E ovary & style F corolla opened up to show stamens. Drawn by Rosemary Wise from A. Pott et al. 6399. Distribution. Known certainly from a few collections from the Corumba region but perhaps also in Piaui . BRAZIL. Mato Grosso do Sul : A. Pott et al. 6399 (CPAP, K). Notes. Very distinctive when both leaf forms present but also easily distinguished by the truncate base of the outer sepals. A specimen from Piaui , Castelo do Piaui , J.M. Costa & D.P. Coutinho 204 (HUEFS, TEPB) appears to belong to this species. It is described as a creeping herb and has the same distinctive sepals but differs in the broader, oblong-elliptic, more hirsute leaf lobes. Without further collections it is impossible to say whether this is a distinct species or merely a form of Ipomoea pantanalensis .