[1]Faculty of Liberal Arts and Science Kasetsart University Kamphaeng Saen Campus Nakhon Pathom 73140 Thailand;
[2]Faculty of Forestry Kasetsart University Chatuchak Bangkok 10900 Thailand;
[3]Protected Area Regional Office 16 Mueang Chiang Mai 50000 Thailand;
Araceae; altitude gradients; Doi Suthep-Pui National Park; mountain ecosystem.;