The genus Geranium L. (Geraniaceae) in North America. II. Perennial species

[摘要] Perennial species ofGeraniumfrom North America north of México are revised. Nineteen species are accepted, of which seventeen belong in subg.Geraniumand two belong in subg.Robertium. Geranium erianthum, G. maculatum, G. oreganum, G. sylvaticum, G. caespitosum, G. californicum, G. lentum, G. wislizenii, G. richardsonii, G. viscosissimumare native, whereasG. pratense, G. sanguineum, G. potentilloides, G. sibiricum, G. thunbergii, G. retrorsum, G. solanderi, G. pyrenaicumandG. palmatumwere introduced from Europe, Asia, and Oceania.Geranium eremophilum, G. fremontü, G. parryi, G. marginóleandG. cowenii , sometimes accepted in currant literature, are considerad to be synonyms ofG. caespitosum . Similarly,G. strigosumandG. attenuilobumare synonymized toG. viscosissimum , andG. concinnumtoG. californicum . Nomenclatura for all species is reviewed, and seventeen lectotypes are designated. Descriptions, key, distribution maps, and illustrations are included.

[学科分类] 植物学

[关键词] Geranium;Geraniaceae;taxonomy;typification;North America