This is a solitary palm that is thought to develop a moderate to tall trunk, though detailed field documentation is limited and somewhat fragmented in available literature. It has a crown of large, arching pinnate leaves that likely form a broad, rounded canopy at maturity. The leaves are expected to be robust and deep green, with numerous leaflets arranged along the rachis, contributing to a strong tropical presence. Its inflorescences emerge among the leaves and produce both male and female flowers, followed by fibrous fruits typical of Attalea, though specific morphological details are not widely documented. Native to Brazil, this species is associated with tropical forest environments, but precise habitat range and ecological preferences remain underreported. As a result, Attalea osmantha is extremely rare in cultivation and primarily of interest to collectors and specialists.