Abstract

Verbena brasiliensis Veil. is here circumscribed so as to include plants with clasping leaf-bases that have habitually been referred to V. bonariensis L. The characters that distinguish the two species are pointed out. For these and a third species, V. litoralis Kunth, synonymy, descriptions, a summary of the distribution in South America and specimen citations of adventive material elsewhere are provided. Nomenclature is discussed and typification of names has been carried out where possible.

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