Résumé
As a result of the ongoing taxonomic revision of the tribe Sipaneeae, a new species of Dendrosipanea and Sipaneopsis from the Brazilian and Colombian Amazon are here described and illustrated; both taxa are endemic to the Brazilian white-sand areas locally called campinas and campinaranas. Their conservation status is assessed, and all specimens examined are cited. A key to the three recognized species of Dendrosipanea is included.