A Revision of the Solanum asterophorum Species Group (subg. Leptostemonum) Author Gouvêa, Yuri Departamento de Botˆanica, Instituto de Ciˆencias Biológicas, Universidade Federal de Minas Gerais, Avenida Antˆonio Carlos, 6627, 31270 - 901, Belo Horizonte, Minas Gerais, Brazil gouvea.yf@gmail.com Author Stehmann, João Departamento de Botˆanica, Instituto de Ciˆencias Biológicas, Universidade Federal de Minas Gerais, Avenida Antˆonio Carlos, 6627, 31270 - 901, Belo Horizonte, Minas Gerais, Brazil text Systematic Botany 2019 2019-03-05 44 1 210 232 http://dx.doi.org/10.1600/036364419x698047 journal article 10.1600/036364419x698047 d21107bb-aa0b-4405-8c02-bea028cd22f3 6338768 KEY TO THE SPECIES Of SOLANUM ASTEROPHORUM SPECIES GROUP 1. Major leaves entire (in mature plants), elliptic, the apex acuminate; stem prickles straight, sparsely distributed (less often with unarmed young stems); calyx cupuliform, usually densely covered with long-stalked trichomes; calyx lobes deltate........................... 3. Solanum piluliferum 1. Major leaves lobed, ovate to obovate, the apex acute to obtuse; stem prickles curved, moderately to densely distributed; calyx obconic, sparsely to densely covered with sessile to short-stalked trichomes; calyx lobes narrowly oblong, elliptic or lanceolate............................... 2 2. Pedicels notably curved downward and the flower buds pointing down; pedicel insertion points evenly and very closely spaced, usually overlapping......................................................................................... 1. Solanum asterophorum 2. Pedicels straight or nearly so, and the flower buds erect to spreading; pedicel insertion points more widely spaced proximally, if overlapping only on the more distal portion of the inflorescence.................................................................................. 3 3. Young stems and adaxial leaf surface completely covered by orange to ferruginous trichomes; branches horizontally spreading (plagiotropic); inflorescence axis unarmed............................................................................ 2. Solanum igniferum 3. Young stems and adaxial leaf surface covered by hyaline to brown-tinged trichomes; branches erect; inflorescence axis usually armed...................................................................................................... 4. Solanum sessilantherum