See text Dichroa was a genus of 12 species of flowering plants in the family Hydrangeaceae, native to eastern and southeastern Asia.

These are deciduous shrubs growing to 1–3 m tall, with their leaves arranged in opposite pairs.

The flowers are produced in a broad inflorescence similar to that of the related genus Hydrangea.

The fruit is a glossy metallic purple-blue berry.

Dichroa febrifuga (Chinese: 常山; pinyin: chángshān) is an important herb in traditional Chinese medicine, where it is considered one of the 50 fundamental herbs.