New species in Chromolucuma, Chrysophyllum, Pouteria and Pradosia (Chrysophylloideae, Sapotaceae) from the Magdalena and Cauca Rivers basins in Colombia

Four new species of Sapotaceae subfamily Chrysophylloideae are described and illustrated, belonging to the genera Chromolucuma, Chrysophyllum, Pouteria and Pradosia. Comments about their distribution, phenology, common names, conservation status and taxonomic affinities are made. All species are distributed in lowlands of the Cauca or Magdalena rivers basins in Colombia. New species are distinguished from their similar congeners by both vegetative and reproductive features. Chromolucuma pentagona is similar to C. cespedesiiformis but distinguished by leaves with more secondary veins, cauliflorous to ramiflorous fascicles, shorter pedicels, stamens inserted in the middle of corolla tube, and longer staminodes. Chrysophyllum caucanum is similar to C. parvulum but distinguished by leaves with less secondary veins, shorter pedicels and calyx, campanulate and shorter corolla, and a lower ratio between tube and lobes length. Pouteria karsticola is similar to P. bulliformis but distinguished by shorter petioles, pedicels, perianth and androecium; pedicels and sepals persistently villous, corolla lobes 2.1–2.2 times longer than the tube, and anther thecae apically mammiform. Pradosia tomentirostris is similar to P. golfodulcensis but distinguished by petioles and leaf primary veins sparsely tomentulose, subsessile flowers and fruits, and densely tomentulose, often rostrate fruits. Chromolucuma pentagona and P. karsticola seem to be endemic to karst reliefs.