ABSTRACT:

A new species of Philodendron (P. lupinum) is described from Acre state, Brazil. It seems to be closer to the species of subgenus Philodendron section Philodendron series Impolita Croat (P. hebetatum, P. strictum and P. thalassicum), but differs from these species by the conspicuously panduriform anterior division and for the presence of fewer ovules per locule. This new species is so far known only from the type locality.