Glycosma maxima- Glycosma occidentale
- Osmorhiza aristata
- Osmorhiza berterii
- Osmorhiza berteroi
- Osmorhiza bolanderi
- Osmorhiza brachypoda
- Osmorhiza claytonii
- Osmorhiza depauperata
- Osmorhiza divaricata
- Osmorhiza glabrata
- Osmorhiza intermedia
- Osmorhiza longistylis
- Osmorhiza mexicana
- Osmorhiza occidentalis
- Osmorhiza purpurea
- Washingtonia ambigua