Calamus bousigonii  Calamus bousigonii, is a liana, a climbing plant, and part of the Arecaceae, or palm, family. It is a member of the subfamily Calamoideae, whose members are usually called rattans in English,  This species, "Calamus bousigonii" Becc., has 2 subspecies, "Calamus bousigonii" subsp. "bousigonii" and "Calamus bousigonii" subsp. "smitinandii" J.Dransf., Kew Bull. 55(3): 713 (2000) The subspecies "smitinandii" "is named for Tem Smitinand (1920-95), Thai botanist extraordinary, who often gave me much encouragement in my studies of Thai palms", John Dransfield This page will discuss the species, but note subspecies differences. The plant's names include "wai huadio" (Thailand), "phdau aré:ch" or "phdav arech" ("phdau"=rattan, Khmer), and "may cun" ("may" is common to rattan species, Vietnam) The "smitinandii" subspecies is called "wai sae ma" (หวายแซ่ม้า) in Trang Province, southern Thailand. The species grows in Thailand, Cambodia and southern Vietnam, and possibly northern peninsular Malaysia. The subspecies "bousigonii" is recorded the same, however Dransfield regards the population in peninsular Thailand (and presumably that in Malaysia) as the "smitinandii" subspecies. The conservation status of the species is unknown, however the population in peninisular Thailand is probably not threatened. The species grows in evergreen forest, where it has stems that yield cane from 5 to 15m long. Occurring in the stunted-forest community, called "forêt sempervirente basse de montagne" by Pauline Dy Phon, in Bokor National Park, Kampot Province, Cambodia, the climber grows at elevations up to 1014m. In Bạch Mã National Park, central Vietnam, which predominantly has tropical and subtropical monsoon evergreen rainforest, it grows at elevations from 400 to 1000m, in areas of 50-60% forest cover.