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 48. Ipomoea uninervis J.R.I. Wood & Scotland , Phytokeys 88 : 28. 2017. (Wood et al. 2017d: 28) Type. BRAZIL. Distrito Federal, proximo ao posto Colorado Chacara FTRC, Centro Oeste, 15°41'S , 47°52'W , 6 Feb. 1999, C. Proenca , R.S. Oliveira, C.M. Clemente, J.F. Ribeiro 2074 (holotype UB8208-2, isotype E). Description. Perennial undershrub; stems erect, to 1.2 m, sparingly branched, grey-puberulent to subsericeous. Leaves subsessile, 4-12 x 0.1-0.5 cm, linear to narrowly oblong, obtuse, shortly mucronate, both surfaces grey-puberulent to subsericeous, abaxaially paler with one prominent longitudinal vein; petioles 0-3 mm, tomentellous. Inflorescence of few-flowered cymes from the upper leaf-axils, forming a terminal usually elongate inflorescence up to 15 cm in length; bracts formed of reduced leaves, caducous so inflorescence appearing naked; peduncles 1-4 mm, grey-tomentellous; bracteoles 1.5 mm, linear, tomentellous, caducous; pedicels 3-7 mm, grey-tomentellous; sepals subequal, 7.5-8 x 3-4 mm, broadly oblong, obtuse to rounded, grey-tomentose, the inner with broad glabrous, scarious margins; corolla c. 4.5 cm long, pink, pubescent, funnel-shaped; limb c. 4 cm diam.; ovary conical. Capsules and seeds not seen. Illustration. Figure 35 . Figure 35. Ipomoea uninervis . A habit B abaxial leaf C outer sepal D inner sepal E corolla opened out to show stamens F ovary and base of style. Drawn by Rosemary Wise from C. Proenca et al. 2074. Distribution. Endemic to the Distrito Federal and Goias State in Brazil, where it appears to be a rare species of cerrado. BRAZIL. Dist. Fed. : type collection. Goias : Cristalina, 5 km along estrada para Paracatu, 16°46'S , 47°37'W , 1050 m, J.R. Pirani et al. 1560 (SPF, K). Note. Ipomoea uninervis appears close to I. aprica but differs in the grey-tomentellous, oblong outer sepals 7.5-8 mm long (these are green-tomentose, broadly ovate to suborbicular and 5-6 mm long in I. aprica ) and the elongate inflorescence with deciduous bracts so appearing naked (not leafy with persistent bracts). It is also close to Ipomoea oblongifolia but differs in the 1-veined leaves and oblong, not elliptic bracts and relatively long inflorescence.