A new combination and taxonomic notes in Pseudobombax Dugand (Malvaceae) Author Carvalho-Sobrinho, Jefferson G. Universidade Federal do Vale do Sao Francisco - UNIVASF, Colegiado de Ciencias Biologicas, BR- 407, Km 12, Petrolina, Pernambuco, 56300 - 990, Brazil jef.sobrinho@gmail.com Author Dorr, Laurence J. Department of Botany, National Museum of Natural History, MRC- 166, Smithsonian Institution, P. O. Box 37012, Washington, D. C. 20013 - 7012, U. S. A. text PhytoKeys 2017 2017-08-09 85 27 30 http://dx.doi.org/10.3897/phytokeys.85.13930 journal article http://dx.doi.org/10.3897/phytokeys.85.13930 1314-2003-85-27 2E51FFCEF66A0E36A81BFFA22D6D2012 1138145 Pseudobombax munguba (Mart.) Dugand, Mutisia 9: 4. 1952. Basionym. Bombax munguba Mart., Nov. Gen. Sp. Pl. 1: 93, t. 99. 1826. - Type: Brazil. Amazonas: Rio Negro, Martius s.n. (lectotype, designated by Robyns (1963) : M! [M0211657, JSTOR image]). = Pseudobombax amapaense A. Robyns, Mem. New York Bot. Gard. 17(1): 195. 1967. - Type: Brazil. Amapa : Rio Jari, near Cachoeira Miriti, 0°41'N , 53°6'W , 180 m, 25 Aug 1961, W. A. Egler & H. S. Irwin 46673 (NY! [NY00133605, NY00133606, NY00133607, JSTOR image]), syn. nov. Notes. The characters (tree height and pubescence of staminal tubes) used by Robyns (1967) to segregate P. amapaense do not permit it to be distinguished from P. munguba based on a more comprehensive sampling in the field and in herbarium collections. Previously, phylogenetic analyses of DNA sequences were interpreted as supporting the accessions examined of these two taxa as sister groups ( Carvalho-Sobrinho et al. 2016 : fig. 2), but we now consider P. amapaense to be a synonym of P. munguba on the basis of combined morphological and molecular evidence.