Purshia tridentata (Antelope Bitterbrush)
- Species description and photo from Washington state, USA.
- http://www.cwnp.org/photopgs/pdoc/putridentata.html

Purshia mexicana var. stansburiana
- Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/shrub/purmexs/

Cowania mexicana
- Image and description of Mexican Cliffrose (also known as Purshia mexicana).
- http://www.naturesongs.com/vvplants/cliffrose.html

Purshia subintegra - Arizona Cliffrose
- Images and description.
- http://www.naturesongs.com/vvplants/azcliffrose.html

Purshia stansburiana
- Images and description of Cliffrose.
- http://www.swcoloradowildflowers.com/White%20Enlarged%20Photo%20Pages/purshia.htm