This document defines key vocabulary terms related to plant anatomy and classification, including peduncle, receptacle, sepal, petal, stamen, anther, pistil, stigma, and ovary. It also distinguishes between angiosperms and gymnosperms as the two main classifications of plants, listing examples of each such as conifers, ferns, and palms for gymnosperms and rafflesia, cherry blossoms, and chrysanthemums for angiosperms.