Archidium oblongifolium (Archidiaceae, subg. Archidiella), a new species from Brazil

Archidium oblongifolium (Archidiaceae, subg. Archidiella) is proposed, described and illustrated as a new species based on collections from central Brazil. It is characterized by oblong leaves and lax leaf cells. A. oblongifolium is currently known only from three specimens from a single area, and could thus be considered vulnerable or threatened.