Cleisostoma simondii is a flowering plant that grows upon larger trees, and known in Hong Kong as (Chinese:蜘蛛蘭).

It also occurs in the Himalayas (Nepal, Bhutan, India, Assam), Cambodia, Laos, Myanmar, Thailand, Vietnam, and other parts of China (Fujian, Guangdong, Hainan, Yunnan).

[1][3] The name "Cleisostoma" derives from the Greek words kleistos, meaning "closed" and "stoma" meaning "mouth".

[4] Cleisostoma simondii grows to a length of 30–40 centimetres (12–16 in) or more, with numerous aerial roots that grow out of the stems.

This hardy orchid grows thin, stem-like jointed leaves 10–28 centimetres (3.9–11.0 in) long that are fleshy, terete, linear year round, with the whole plant colors ranging from green to dark green under humid, low light conditions, to red to purple under drier more sunlit conditions.