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

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