ABSTRACT:

The genus Arisaema belongs to the Arum family – Araceae, which includes about 210 species Govaerts & Frodin, 2002 and is distributed from temperate to tropical areas, mainly in high mountain region. Since established by Martius in 1831, the genus Arisaema was studied by different authors such as Schott (1860), Engler (1920), D. Chatterjee (1955), Hara (1971), Li Heng (1979), Ohashi and Murata (1980), Murata (1984), V.D. Nguyen (1998, 2000, 2002, 2005, 2007). In Engler’s publication, many new species from different countries were described. Among them, Arisaema pierreanum was described based on the collection from Ba Den mountain (Tay Ninh province of Vietnam) made by L. Pierre in his journey in Indochina in 1869. Over 150 years passed without any collection of this species made from other places and with no information published on this species. This paper redescribes the species with more detailed morphological characters, discusses the status of the plant now, and provides images of living plants.