竹茎兰属（学名：Tropidia）是兰科下的一个属，为陆生兰。该属共有约20种，分布于热带亚洲和中美洲以及北美洲南部。

Tropidia is a genus of terrestrial, partly myco-heterotrophic orchids distributed across the warmer parts of both the Eastern and Western Hemispheres. Species are known that are native to China, Japan, the Indian Subcontinent, Indonesia, Indochina, Philippines, New Guinea, Australia, Latin America (from Mexico to Ecuador), the West Indies, Florida, and various islands of the Pacific (Solomon Islands, Fiji, New Caledonia, Galápagos, Vanuatu, the Ryukyus, etc.)