title: Two new species in the Matelea stenopetala complex (Apocynaceae, Asclepiadoideae) from the Guiana Shield and Amazonian Brazil.
abstract: Two new species in the Matelea stenopetala complex (Apocynaceae, Asclepiadoideae) are described from the Guiana Shield and Amazonian Brazil: Matelea brevistipitata Krings & Morillo, sp. nov. and Matelea trichopedicellataKrings & Morillo, sp. nov. The new species belong to a small group of adaxially-pubescent-flowered taxa within the complex, including Matelea hildegardiana and Matelea pakaraimensis. The new species are described and a dichotomous key is provided.
authors.affiliation: Herbarium, Department of Plant Biology, North Carolina State University, Raleigh, NC 27695-7612, USA.
authors.forename: Alexander
authors.initials: A
authors.lastname: Krings
authors.forename: Gilberto
authors.initials: G
authors.lastname: Morillo