紫丹属（学名：Tournefortia）是紫草科下的一个属，为乔木、灌木或藤本植物。该属共有约150种，分布于热带和亚热带地区。

Tournefortia, commonly known as soldierbush, is a genus of flowering plants in the borage family, Boraginaceae.

It was first published under the name Pittonia by Charles Plumier in 1703, in honour of Joseph Pitton de Tournefort. Later, Carl Linnaeus changed the name to Tournefortia, on the grounds that Tournefort was virtually unknown by his family name outside France.