A new species of Sinningia (Gesneriaceae) and additional floristic data from Serra dos Carajás, Pará, Brazil

The new species Sinningia minima (Gesneriaceae) from Serra dos Carajás (Pará, Brazil) is described and illustrated. It is readily distinguished from its congeners by its minute size, being smaller in all vegetative and fertile organs than any other Sinningia species. It is also the first member of this genus registered for the Pará State. New floristic data and an identification key to the Gesneriaceae from the Serra do Carajás are also provided.