oncidium: any orchid of the genus Oncidium: characterized by slender branching sprays of small yellow and brown flowers; often grown as houseplants
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors
meadow rue: any of various herbs of the genus Thalictrum; sometimes rhizomatous or tuberous perennials found in damp shady places and meadows or stream banks; have lacy foliage and clouds of small purple or yellow flowers