(bound form) an orchid with long, stiff leaves and a strong fragrance, specifically the 蕙兰 huì​lán; historically used as an aromatic herb to ward off pests or disease; also refers to the tonka bean (Coumarouna odorata)

(bound form) orchid; refers to several varieties of fragrant plants like 兰花 lán​huā, 兰草 lán​cǎo, and 木兰 mù​lán