Allamanda angustifolia Antelope horns Be-still Tree Blue periwinkle Butterfly Weed Calotrope Caralluma sinaica Caralluma tuberculata Carissa carandas Catharanthus longifolius Catharanthus ovalis Cionura Clasping Milkweed Climbing dogbane Common frangipani Common Milkweed Crown Flower Cuayote Desert rose Eastern Bluestar Elephant's Foot Plant European Caralluma Fewflower milkweed Fourleaf milkweed