Telosma cordata

Telosma cordata (Chinese: 夜來香; lit. 'night-blooming fragrance') is a species of flowering plant in the family Apocynaceae (tribe Marsdenieae), native to China and Indo-China. It is cultivated elsewhere and may occur wild as an introduced species. Common names include Chinese violet, cowslip creeper, Pakalana vine, Tonkin jasmine and Tonkinese creeper. The plant bears clusters of golden yellow blooms along the vining stems during summer months. Individual blooms emerge successively over a period of weeks emitting a rich, heavy fragrance during the day and night.