鸡骨常山属（学名：Alstonia），又称黑板树属，是夹竹桃科下的一个属。该属共有约50种，分布于热带非洲和亚洲至波里尼西亚。

Alstonia is a widespread genus of evergreen trees and shrubs, of the dogbane plant family Apocynaceae. It was named by Robert Brown in 1811, after Charles Alston (1685–1760), Professor of botany at Edinburgh from 1716-1760.

The type species Alstonia scholaris (L.) R.Br. was originally named Echites scholaris by Linnaeus in 1767.