Sphaeralcea bonariensis (Cav.) Griseb. (Malvaceae): nova ocorrência para o Brasil

In this paper is recorded the new ocurrence of Sphaeralcea bonariensis to State of Rio Grande do Sul. The species is described, illustrated and ecologically characterized. We also provide relevant information about its conservation status. We present a key to distinguish it from a species of the genus which also occurs in the State.