What's in a variety?

摘要

Among its nine definitions of 'variety', Dictionary.com1 defines this noun as:1. "a kind or sort"2. "a category within a species, based on some hereditary difference"3. "a type of animal or plant produced by artificial selection"Meanwhile, 'Cultivar' (noun) is given just one definition:1. "a variety of plant that originated and persisted under cultivation"1.