A new endemic species of Galianthe (Rubiaceae) from Serra Geral, and updated taxonomy of the genus from Rio Grande do Sul, Brasil

FLORENTIN JAVIER E; NUÑEZ FLORENTIN, M.; CABRAL E. L.

Vitoria, Espirito Santo

Congreso; 67º Congresso Nacional de Botanica, XXXVI ERBOT e 8ª Jornada Capixaba de Botanica.; 2016

Sociedade Botânica do Brasil

Galianthe Griseb. belongs to the family Rubiaceae. It is the fourth most important family of angiosperms in number of species; currently has about 650 genera and 13,000 species. Recent studies of molecular phylogeny, show that Galianthe is a monophyletic genus and is positioned within the Spermacoce clade. The present study is an update of the taxonomy of the genus Galianthe for the state of Rio Grande do Sul; a brief description of the species is included, diagnostic characters are illustrated and the distribution of the species is discussed, taking into account the biogeographic regionalization of the state. The species were analyzed by classical taxonomy techniques and georeferencing. As a result, 12 species are registered, distributed in 7 biomes, one of which concentrates all taxa, Subtropical Seasonal Forest. Also, the new species Galianthe sp. nov. is described and illustrated, differentiated from the other species by the verticillate leaves and bifid style.