See text Hydnophytum is a genus of epiphytic myrmecophytes (ant plants) native to Southeast Asia, the Pacific region and also extending into Queensland in northern Australia.

The name is derived from the Ancient Greek hydnon "tuber", and phyton "plant", after their appearance with their swollen succulent stems.

Hollow, smooth-walled tunnels form within the caudex with external entrance holes, providing an above-ground home for ant colonies.

Ants likewise provide defense for the plant and prevent tissue damage, swarming to defend their home if disturbed.

This symbiosis allows the plants to effectively gather nutrients (via the ants) from a much larger area than the roots ever could cover.