eth·no·bot·a·ny 
(ĕth′nō-bŏtn-ē)
(ĕth′nō-bŏtn-ē)n.
1. The branch of ethnobiology that studies the plant lore and agricultural customs of a people.
2. The study of such lore and customs.
eth′no·bo·tani·cal (-bə-tănĭ-kəl) adj.
eth′no·bo·tani·cal·ly adv.
eth′no·bota·nist n.