Oreostemma is a genus of flowering plants in the family Asteraceae. Species are found in western North America, with two endemic to California.

1. Species

2. Oreostemma alpigenum (Tundra aster) – California, Nevada, Oregon, Washington, Idaho, Montana, Wyoming

3. Oreostemma elatum (Plumas alpine aster) – Sierra Nevada, California

4. Oreostemma peirsonii (Peirson's aster) – endemic to California, in the southern Sierra Nevada.

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