Descriptions: 
Perennial and subshrublike herbs, erect, latex, the whole plant is toxic.simple leaf and opposite, lanceolate or oblong lanceolate; Umbel is Terminal or axillary, corolla is colyliform and five deep cleft, red, corona is yellow, Like sunshine, ventilation, warm and dry environment. florescence have 5 to 8 months, it can be used as ornamental crops for landscaping.