High Quality Content by WIKIPEDIA articles! Cestrum diurnum (Din Ka Raja) is a species of Cestrum, native to the West Indies. Common names include Day-blooming Cestrum, Day-blooming Jessamine, and Day-blooming Jasmine. Also known as Din ki Raja (King of the day), in Urdu and Hindi. The scent of this quick-growing and evergreen woody shrub, often used for screens and borders, is released by day. Cestrum diurnum is easily propagated from the seed, which it produces in abundance.