Three new species of Ponthieva (Orchidaceae, Spiranthoideae) from Colombia and Venezuela.

Three new species of Ponthieva, P. camargoi, P. castanedoi, and P. cesarensis are described and illustrated based on Colombian and Venezuelan material. The comparisons of the floral characters of the new entities and closely allied species are illustrated. The information about habitat and ecology of all three species is provided and their distribution map is presented. [ABSTRACT FROM AUTHOR]