Tweedia is a genus of flowering plants in the Apocynaceae family, first described as a genus in 1835. The genus is native to South America. An ornamental plant, Oxypetalum coeruleum, formerly included in this genus is commonly referred to as "tweedia". formerly included 1. \n* Tweedia coerulea, syn of Oxypetalum coeruleum 2. \n* Tweedia floribunda, syn of Oxypetalum solanoides 3. \n* Tweedia macrolepis, syn of Oxypetalum macrolepis 4. \n* Tweedia versicolor , syn of Oxypetalum coeruleum