Abstract
Clidemia clandestina (Melastomataceae) of Costa Rica and Panama is newly described as part of a review of the goblet-flowered species from tropical America. This natural group of three species, including C. garciabarrigae and C. utleyana, is characterized by 5-merous flowers that are goblet-shaped in profile view with erect red petals that are connivent and cucullate at anthesis, minute anther thecae with wide ventrally inclined apical pores, and a completely inferior 3-locular ovary. An original chromosome count of n = 17 is reported for C. utleyana, and a count of n = 23 is reported for C. clandestina and C. garciabarrigae. The significance of these chromosome numbers is evaluated in the context of previous reports for the tribe Miconieae together with a diagnostic key, descriptions, illustrations, new distributional information, phenological notes, and citations of representative
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