Commelina singularis Vell. A–B Original plate of Vellozo’s C. singularis: A line drawings of habit, inflorescence and floral characters B detail of floral characters. C, photos of a natural population of Tripogandra diuretica from the Jardim Botânico Rio de Janeiro, RJ: detail of the inflorescence, showing flowers with white corolla D–E photos of T. diuretica from the municipality of Petrópolis, RJ: D detail of floral characters of a flower with lilac corolla E detail showing the leaves (note the parallel venation characteristic of the species) SS sterile stamens; FS fertile stamens; Gy gynoecium. Photo of C. singularis plate from Biodiversity Heritage Library; All field photos by M.O.O. Pellegrini.