A New Epiphytic Species of Blakea (Melastomataceae: Blakeeae) from the Caribbean Rain Forest of Costa Rica

摘要

Blakea hammettiorum, a new species from low elevation rain forests of southeastern Costa Rica is described, illustrated, and compared with its closest presumed relatives in the Mesoamerican region. In addition to its glabrous, coriaceous leaves with acarodomatia on the abaxial surfaces, and laterally coherent anther thecae, this new species is distinguished by its narrowly oblong, apically rounded petals, narrow free floral bracts with scattered spreading gland-tipped frichomes on the adaxial surface, hypanthia that are covered with a dense but inconspicuous matted furfuraceous indument, and calyx lobes that are conspicuously glandular-setose at the apex.