An orchid is a type of flower of the family orchidaceae common to Earth and other planets.
Amanda Grayson grew Terran orchids in her wet-planet conservatory on Sarek's estate on Vulcan. (TOS novel: Vulcan's Forge)
James T. Kirk inspected a large orchid growing near a cave on the planet Raylo in the 2260s. (TOS comic: "Rescue at Raylo")
Edosian orchids were a favorite flower of Elim Garak, and planted around Cardassia and on Romulus. (DS9 novel: A Stitch in Time)
Savalek, a Vulcan biologist, tried to grow a Kylo orchid in the USS Titan arboretum. (TTN novel: Taking Wing)