Amicia is a genus of flowering plants in the legume family Fabaceae, placed in the subfamily Faboideae. It comprises seven accepted species and has been assigned to the informal monophyletic Adesmia clade, a group of primarily South American legumes. The genus is native to the Neotropics, ranging from Mexico south through Panama and along the Andes through Ecuador, Peru, and Bolivia, reaching northwestern Argentina. Bolivia is the centre of diversity, with six of the seven species occurring there.
As members of Faboideae, Amicia species bear the characteristic papilionaceous (pea-like) flowers and produce legume fruits. The seven recognized species are: A. andicola (central Bolivia to northwestern Argentina), A. fimbriata (central Bolivia to northwestern Argentina), A. glandulosa (southern Panama to northern Peru), A. lobbiana (central Peru to central Bolivia), A. medicaginea (Bolivia and northwestern Argentina), A. micrantha (Bolivia), and A. zygomeris (Mexico). The genus was named in honour of Giovanni Battista Amici (1786–1863), an Italian astronomer, mathematician, and pioneering microscopist known for his improvements to compound microscope optics.
The most widely known species is Amicia zygomeris, native to Mexico and the geographically most isolated member of the genus. The genus remains taxonomically understudied, with limited published morphological descriptions and phylogenetic data relative to larger legume genera.
Etymology
The genus Amicia was named in honour of Giovanni Battista Amici (1786–1863), an Italian astronomer, mathematician, and pioneering microscopist. Amici made significant contributions to optical instrument design and is remembered for his work on compound microscope optics.
Distribution
Amicia is distributed across the Neotropics, from Mexico south through Panama and along the Andes mountain range through Ecuador, Peru, and Bolivia, reaching northwestern Argentina. Bolivia hosts the greatest species diversity, with six of the seven species occurring within its borders. The individual species occupy distinct, often allopatric ranges along the Andean cordillera and adjacent regions.
Taxonomy Notes
Amicia belongs to the subfamily Faboideae (Papilionoideae) and has recently been assigned to the informal monophyletic Adesmia clade, a group of primarily South American legume genera. The genus was established in the early 19th century; Amicia zygomeris bears the author citation DC., indicating it was described by Augustin Pyramus de Candolle. GBIF records ten descendant taxa under the genus, though only seven are widely accepted as distinct species.
