山马茶（学名：Tabernaemontana divaricata）为夹竹桃科马蹄花属下的一个种。

Tabernaemontana divaricata (Apocynaceae), commonly called pinwheelflower, crape jasmine, East India rosebay and Nero's crown is an evergreen shrub probably native to India and now cultivated throughout South East Asia and the warmer regions of continental Asia. In zones where it is not hardy it is grown as a house/glasshouse plant for its attractive flowers and foliage. The stem exudes a milky latex when broken, whence the name Milk Flower (দুধফুল), টগর or কাঠমল্লিকা in the Bengali language. It is known as wathusudda වතුසුද්ද (meaning "garden white") in the Sinhalese language. In the Telugu language it's called nandivardhanam [నందివర్దనం]. Other Indian names include chandni and taggar. In Cambodia, it is called phka nuon srei ផ្កានួនស្រី or phka dâk khut ផ្កាដកឃុត. The plant contains several alkaloids and, like many other Apocynaceae, is toxic and medicinal.