A blue-leaved plant on the surface of Talos IV whose vibrating fronds give off a musical tone, which stops when Pike and Spock take hold of them in The Cage.
The Talosian singing plant is a form of vegetation seen on Talos IV in The Cage, the first Star Trek pilot, set in 2254. The footage was reused in the two-part episode The Menagerie.
Shortly after beaming down in answer to a distress call, Captain Pike and his landing party hear a strange, sustained note on the wind. They trace it to a clump of blue plants with quivering leaves. When Pike grips one of the leaves the sound from it ceases, and when Spock does the same the chorus thins again, drawing an open grin from the young Vulcan science officer.
The moment is famous mainly for that smile, filmed before the character's reserve had been settled. The plants themselves, unlike almost everything else the party meets on Talos IV, appear to be real.