stevia: any plant of the genus Piqueria or the closely related genus Stevia
herb: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
anal personality: (psychoanalysis) a personality characterized by meticulous neatness and suspicion and reserve; said to be formed in early childhood by fixation during the anal stage of development (usually as a consequence of toilet training)