botany, phytology - the branch of biology that studies plants

capsule - a dry dehiscent seed vessel or the spore-containing structure of e.g. mosses

plant process, enation - a natural projection or outgrowth from a plant body or organ

invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification

anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical structure; "he has good bone structure"