Magnolia pajarito, a new species from the Andean slopes of the Eastern Cordillera of Colombia, is described and illustrated, and its morphological relationships with other similar Magnolia species are discussed. This new species is a tree between 9 and 30 m tall from montane forest remnants and pasture lands with dispersal trees (1500–1700 m), and it does not appear to be closely allied to any particular Magnolia species. This new species shares several features with four other species (M. arcabucoana, M. caricifragans, M. santanderiana, and M. virolinensis) in section Talauma. Morphologically it has some similarity to M. arcabucoana, but it differs in the length of the adaxial scar of the petiole, the size and shape of the leaf blade, the sepal and inner petal, and in the number of secondary veins, vaginal hypsophyl, and stamens. Additionally, habitat information, a distribution map, and data on Magnolia conservation status are included. An identification key of species of Magnolia found in Colombia is also provided. This new species elevates to 40 the number of Magnolia taxa for the flora of Colombia, of which 31 are endemic. Colombia has the highest diversity of the genus in the neotropics.

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Piper quinchasense is described and illustrated as a new species occurring in the understory of wet montane forest of the middle Magdalena Valley in Colombia, the easternmost portion of the Chocó Region. Its relationships are discussed with related taxa from the Macrostachys clade. An identification key for 35 Neotropical Piper species with peltate leaves is provided.