Anales del Jardín Botánico de Madrid, Vol 59, No 2 (2001)

California, a new genus of Geraniaceae endemic to the southwest of North America

Juan José Aldasoro
Real Jardin Botánico, CSIC, Spain

Carmen Navarro
Departamento de Biología Vegetal II, Facultad de Farmacia, Universidad Complutense, Spain

Pablo Vargas
Real Jardin Botánico, CSIC, Spain

Llorenç Saez
Departamento de Botánica, Facultad de Biología, Universidad Autonoma de Bellaterra, Spain

Carlos Aedo
Real Jardin Botánico, CSIC, Spain


Morphological data provide evidence for the separation of Erodium macrophyllum Hook. & Arn. in a new genus, different from either Erodium and Monsonia (Geraniaceae). Also cpDNA sequence data (rrnL-F) support this view. Thus, we propose the recognition of a new monotypic genus, California Aldas., C. Navarro, P. Vargas, Ll. Saez & Aedo, to better reflect phylogenetic relationships in Geraniaceae. We provide diagnosis, illustrations, comparative analysis of distinctive characters, and a key to genera of Geraniaceae. The new combination proposed is: California macrophylla (Hook. & Am.) Aldas., C. Navarro, P. Vargas, Ll. Saez & Aedo, comb. Nov. [basion.: Erodium macrophyllum Hook. & Am.]; and two lectotypes are designed.


taxonomy; morphology; Geraniaceae; Erodium; Monsonia; new genus; North America

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