| lewisia | (n) genus of western North American low-growing herbs having linear woolly leaves and large pink flowers, Syn. genus Lewisia |
| siskiyou lewisia | (n) evergreen perennial having a dense basal rosette of long spatula-shaped leaves and panicles of pink or white-and-red-striped or pink-purple flowers; found on cliffs and in rock crevices in mountains of southwestern Oregon and northern California, Syn. Lewisia cotyledon |
| bitterroot | (n) showy succulent ground-hugging plant of Rocky Mountains regions having deep to pale pink flowers and fleshy farinaceous roots; the Montana state flower, Syn. Lewisia rediviva |