Lophophytum weddellii was known to only occur in unflooded forests between 500–1,000 m in Colombia and Peru. These new records for the Brazilian flora expand the geographic distribution of the species, and also show that it occurs near seasonally flooded forests at lower elevations (<500 m). This work presents taxonomic remarks, photographs of living and herbarium specimens of L. weddellii, as well as a geographic distribution map and risk assessment at the regional scale.