Revision of Carapichea (Rubiaceae-Psychotrieae) in the Guianas, with two new combinations and transfer of three species to Notopleura

Background and aims – The genus Carapichea (Rubiaceae), recently resurrected separated from Psychotria , currently includes 24 Neotropical species is morphologically heterogeneous. A revision of the in Guianas presented here, as part authors’ work on Rubiaceae treatment Flora series. Material methods This paper based a study herbarium specimens BBS, BM, BR, BRB, CAY, INPA, K, P, P-JJR, U; type other herbaria were consulted online. Some also studied field by authors. Normal practices taxonomy have been applied. Results Three previously included ( C. altsonii nivea sandwithiana ) show aberrant characters for are transferred to Notopleura ; new combinations published former two N. ). Eight one them still imperfectly known, recorded Guianas; ninth species, araguariensis this it expected occur region. New species: galbaoensis squamelligera P. respectively; was synonymy guianensis which here redefined narrower sense. delimitation ligularis expanded include pacimonica synonym. first records adinantha French Guiana Shield documented. remaining tillettii urniformis left unchanged. For every complete description presented, well data distribution, ecology, phenology, local names (when known), list collections studied.