This genus consists of about 25 species and many named hybrids. Some of them form clumps while others are spreading perennials that multiply by woody rhizomes. They tend to move at a moderate rate and are not considered invasive although they work well as a groundcover.

The foliage of epimediums is called "semi-evergreen" which means that, in areas with mild winters, the foliage maintains itself through the winter. In severe winters, the foliage may be damaged and need to be cut down in the early spring to encourage new growth.