Silk tree, guanacaste, monkey's earring: a generic system for the synandrous Mimosaceae of the Americas. Part III. Calliandra.
This alphataxonomic revision of genus Calliandra Bentham continues systematic work on tribe Ingeae of the New World. No comprehensive account of the genus has appeared since 1875, and its definition and content have become incoherent, an obstacle to floristic work presently in preparation. As redefined, the genus is endemic to the Americas, extending from New Mexico to Chile, the so-called calliandras of Africa and Asia being excluded, as is the recently segregated American genus Zapoteca H. Hernández. The genus comprises 132 species, some composed of two to several varieties, that are assigned to five sections and 14 series, all newly described. Of 168 specific and varietal taxa recognized, 36 are new. Each taxon is fully described, its nomenclature is analysed in the context of current rules of nomenclature, and its distribution recorded verbally or in a map. Thirty-four taxa are illustrated, and a list of exsiccatae examined is provided.