Perennials -
Sedum
Sedum is
the large stonecrop genus of the Crassulaceae, representing
about 400 species of leaf succulents, found throughout the
northern hemisphere, varying from annual groundcovers to shrubs.
The plants have water-storing leaves and a typical form of blossom
with five petals, seldom four or six. There are typically twice as
many stamens as petals. Well known European Sedums are Sedum
acre, Sedum album, Sedum dasyphyllum, Sedum reflexum (also known
as Sedum rupestre) and Sedum hispanicum. Many sedums are
extensively cultivated as garden plants, due to their interesting
and attractive appearance and hardiness. The various species
differ in their requirements; some are cold-hardy but do not
tolerate heat, some require heat but do not tolerate cold. They
are preferred to grass for green roofs, popular in Germany and
some other countries.
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