Diagnose: —A. alvimii L. B. Smith & R. W. Read affinis sed inflorescentia bipinnata laxe-ramosa ramis paucifloris, foliis distincte antrorso-serratis, bracteis floralibus minutis vel carentibus et floribus lilacinis differt. Typus: Brazil, Harley 18195 (holotypus CEPEC).Edited from : Kew Bull.. (protologue) .