Taxonomic studies of Moraceae and Cecropiaceae of Central America and the Andean region led to establishment of the following new taxa and combinations in Moraceae: Brosimum multinervium C. C. Berg, Ficus carchiana C. C. Berg, F cotinifolia Kunth var. hondurensis (Standley & L. O. Williams) C. C. Berg, F osensis C. C. Berg, F rieberiana C. C. Berg, Maquira guianensis Aublet subsp. costaricana (Standley) C. C. Berg, Naucleopsis capirensis C. C. Berg, N. herrerensis C. C. Berg, N. humilis C. C. Berg, N. naga Pittier subsp. meridionalis C. C. Berg, N. straminea C. C. Berg, N. ulei (Warburg) Ducke subsp. puberula C. C. Berg, N. velutina C. C. Berg, Pseudolmedia glabrata (Liebmann) C. C. Berg, Sorocea jaramilloi C. C. Berg, S. pubivena Hemsley subsp. oligotricha (Akkermans & C. C. Berg) C. C. Berg, S. pubivena Hemsley subsp. hirtella (Mildbraed) C. C. Berg, S. ruminata C. C. Berg, S. sprucei (Baillon) Macbride subsp. subumbellata C. C. Berg; and in Cecropiaceae: Cecropia annulata C. C. Berg & P. Franco, C. heterochroma C. C. Berg & P. Franco, C. puberula C. C. Berg & P. Franco, C. tacuna C. C. Berg & P. Franco, Coussapoa david-smithii C. C. Berg, and C. villosa Poeppig & Endlicher subsp. polycephala C. C. Berg. For Ficus intramarginalis (Liebmann) Miquel a lectotype is designated. In connection with floristic treatments (Flora Mesoamericana and the Flora of Ecuador), a revision of the genus Cecropia, and less specific studies on Moraceae and Cecropiaceae of the Andean region, several new taxa have been found in the material studied. Some new combinations have to be made in addition to those of Cecropia, Coussapoa, and Pourouma recently published in the Flora of Ecuador (Berg & Franco, 1993).