Sedum album
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Sedum album, the 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-drai
White stonecrop, Autonomous Province of Bolzano – South Tyrol, Italy imported from i Naturalist photo 382140510
As an introduced species, in British Columbia (Canada)
The plant on the left is relatively drought stressed and the one on the right is well watered
S. album (left) introduced in British Columbia, compared to the native S. oreganum (right)
Photoperiodism
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Photoperiod is the change of day length over the seasons. Earth's rotation around its axis produces 24-hour changes in light and dark cycles on Earth. The length of the light and dark in each phase va
Sedum album
…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 summer. Three subspecies album, micranthum (Bastard ex DC.) Syme and teretifolium Syme have…
Pr converts to Pfr during the day time and Pfr slowly reverts to Pr during the night time. When nights are short, an excess amount of Pfr remains in the day time and during long nights, most of the Pfr is reverted to Pr.
Long Day Plants
Short Day Plants