A new Casearia (Salicaceae) from the Atlantic Forest of Brazil Author Nepomuceno, Francisco Álvaro Almeida Author Alves, Marccus text Phytotaxa 2017 2017-06-30 311 3 297 300 http://dx.doi.org/10.11646/phytotaxa.311.3.12 journal article 10.11646/phytotaxa.311.3.12 1179-3163 Key to the species of Casearia sect. Casearia group Arboreae occurring in the Atlantic Forest of Brazil . 1. Leaf blade oval to oblong-oval ...................................................................................................................................... C. mestrensis 1’. Leaf blade elliptical to oblong-elliptical or lanceolate to oblong-lanceolate. 2. Leaf blade with glands scattered on both sides; apex of the leaf with apicule ................................................................ C. souzae 2’. Leaf blade without glands; apex of the leaf without apicule. 3. Inflorescence sessile to subsessile, peduncle up to 1.0 mm long, flowers sessile .............................................. C. grandiflora 3’. Inflorescence pedunculate, peduncle equal to or greater than 2.0 mm long, flowers pedicellate. 4. Leaf blade with asymmetrical base, leaf surface sparsely-pilose and pilose on the veins on the adaxial surface; lobes of the nectariferous disc 4-lobed at the apex ................................................................................................................ C. ulmifolia 4’. Leaf blade with symmetrical base, leaf surface glabrous and glabrous to tomentose on the veins on the adaxial surface; lobes of the nectariferous disc without lobes at the apex. 5. Branches sparsely lenticellate and velutinous; leaf with adaxial surface tomentose; sepals ovate and internal surface with adpressed trichomes; anthers with apical glands barbed; lobes of the nectariferous disc clavate to oblong-clavate and villous to dense-villous at the apex, glabrescent at the base; stigma hirsute ............................................ C. arborea 5’. Branches densely lenticellate and pubescent; leaf glabrous; sepals oblong and internal surface glabrous; anthers with apical glands glabrous; lobes of the nectariferous disc oblong and pilose; stigma glabrous ........................ C. marquetei