Sativum, Sativus, and Sativa are Latin botanical adjectives meaning cultivated, used to designate certain seed-grown domestic crops. Sativa (ending in-a) is the feminine form of the adjective, but masculine (-us) and neuter (-um) endings are also used to agree with the gender of the nouns they modify.For example, the masculine Crocus sativus and neuter Pisum sativum.ativa (ending in-a) is the feminine form of the adjective, but masculine (-us) and neuter (-um) endings are also used to agree with the gender of the nouns they modify. For example, the masculine Crocus sativus and neuter Pisum sativum.