On the taxonomic identity of Arisaema pierreanum Engl. (Araceae) in Vietnam

The taxonomic identity of the rare Arisaema pierreanum Engl. has been disagreed by botanists, mostly due to the lack of diagnostic characteristics of its female inflorescence. In this paper, a detailed description of the species is provided based on our new living collections from the type location, Ba Den Mountain, by which we reconfirm its specific status and eliminate a former question about its possible conspecific form of A. roxburghii Kunth and A. harmandii Engl.