Sedum album or white stonecrop, is a flowering plant of the genus Sedum in the family Crassulaceae. It is found in the northern temperate regions of the world, often growing in crevices or free-draining rocky soil. As a long-day plant it grows vegetatively for most of the year and flowers in June and July. 
Sedum album is able to acclimate to its environment. It can switch between C3 carbon fixation and crassulacean acid metabolism (CAM) depending on the availability of water. CAM saves water as the stomata on its leaves only open to allow CO2 to diffuse into the leaves at night when the temperature (and therefore evapotranspiration) is lower. Drought stressed plants are also more susceptible to photoinhibition which CAM may help to protect against.
Hardy to Zones 3-9
- Castillo, F J (9 December 2004). "Antioxidative protection in the inducible CAM plant Sedum album L. following the imposition of severe water stress and recovery". Oecologia (Springer Berlin / Heidelberg) 107 (4): 469–477. doi:10.1007/BF00333937. Retrieved 30 June 2009.
- Natural History Museum: Sedum album subsp. album
- Tela Botanica. Sedum album
- Missouri Botanical Garden: Sedum album subsp. teretifolium 'Murale'
- Earnshaw, M. J.; Carver, K. A.; Lee, J. A. (1985). "Changes in leaf water potential and CAM in Sempervivum montanum and Sedum album in response to water availability in the field". Oecologia 67 (4): 486. doi:10.1007/BF00790018.
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