This paper consists of a floristic study of Glandularia J.F. Gmel. (Verbenaceae) at Rio Grande do Sul state, Brazil. The genus has about 80 species which occur in subtropical and temperate regions of South America and North America. Field collections, bibliographic, and herbaria revision were made to accomplish this study. Glandularia is represented in the State by 27 species, and six of them are recorded for the first time. A species key, descriptions, illustrations, and comments are presented.
Glandularia; Verbenaceae; floristics; Rio Grande do Sul
