A plant that completes its life cycle in 1 year; i.e., germinates from seed, produces seed, and dies in the same season. Examples include pigweed, ragweed, mustard, foxtail, and crabgrass. A winter annual is one that germinates in the fall, lives over winter, then flowers and seeds the following spring and summer. Pennyroyal, hedge mustard, and peppergrass are winter annuals. (Also see Winter Annual.)