Abstract
This article presents the results of a study of a large material of Colombian Lycopodiaceae, describing 75 species of the genus Phlegmariurus, some of them subdivided into several varieties. Their nomenclature, distribution and habitats are indicated, and problems of species delimitation and infraspecific variation are discussed. All species are illustrated, and studied specimens are cited. An attempt has been made to group the species, mainly following the clades of recent molecular studies. The following taxa are described as new to science: Phlegmariurus cocuyensis, P. cruentus var. exilis, P. cruentus var. illimitatus, P. idroboi, and P. josesantae.