Gleasonia, Henriquezia, and Platycarpum (Rubiaceae) by George King Rogers
This title is monograph 39 in the Flora Neotropica series. The author presents a detailed study of three genera of Rubiaceae in the tribe Henriquezieae. The first part of the monograph takes an anatomical approach to exploring the familial status of Henriquezia and Platycarpum and their relationship to Gleasonia. The second part is a taxonomic revision of the tribe.