Sedum

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Sedum
File:Biting stonecrop close 800.jpg
Biting Stonecrop (Sedum acre)
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Core eudicots
Order:
Saxifragales
Family:
Crassulaceae
Subfamily:
Sedoideae
Tribe:
Sedeae
Subtribe:
Sedinae
Genus:
Sedum
Species

Many, see text & Wikispecies for more.
Synonyms
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File:Mauerpfeffer Sedum acre.jpg
Sedum acre
File:Sedum caeruleum.jpg
Sedum caeruleum
File:Sedum dendroideum 1.jpg
Sedum dendroideum
File:Sedum glaucophyllum3.jpg
Sedum glaucophyllum
File:Sedum ochroleucum.JPG
Sedum ochroleucum
File:Sedum reflexum 01.jpg
Sedum reflexum
File:Sedum spathulifolium2.jpg
Sedum spathulifolium
File:Sedum stenopetalum2.jpg
Sedum stenopetalum
File:Sedum lanceolatum (Keck).jpg
Sedum lanceolatum

Sedum is a large genus of flowering plants in the family Crassulaceae, members of which are commonly known as stonecrops. The genus has been described as containing up to 600 species [2] of leaf succulents that are found throughout the Northern Hemisphere, varying from annual and creeping herbs to shrubs. The plants have water-storing leaves. The flowers usually have five petals, seldom four or six. There are typically twice as many stamens as petals.

A number of species, formerly classified as Sedum, are now a separate genus Hylotelephium.

Well known European Sedums are Sedum acre, Sedum album, Sedum dasyphyllum, Sedum reflexum (also known as Sedum rupestre) and Sedum hispanicum.

Taxonomy

Sedum demonstrates a wide variation in chromosome numbers, and polyploidy is common. Chromosome number is an important taxonomic feature. ('t Hart 1985)

Species

Linnaeus originally described 16 species of European Sedum.[3] There are now thought to be approximately 55 European species.[4]

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Formerly placed here

File:Sedum telephium ssp maximum 1.jpg
Hylotelephium telephium ssp. maximum, formerly placed in Sedum

Now in Dudleya:

Now in Hylotelephium:

Now in Rhodiola:

Ecology

Sedum species are used as food plants by the larvae of some Lepidoptera species including Grey Chi. In particular, Sedum spathulifolium is the host plant of the endangered San Bruno elfin butterfly of San Mateo County, California.

Uses

Ornamental

Many sedums are 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.

Numerous hybrid cultivars have been developed, of which the following have gained the Royal Horticultural Society's Award of Garden Merit:-

  • 'Herbstfreude' ('Autumn Joy')[7]
  • 'Bertram Anderson'[8]
  • 'Matrona'[9]
  • 'Ruby Glow'[10]

As food

File:Yellow stonecrop flowers.JPG
Yellow stonecrop flowers

The leaves of most stonecrops are edible,[11] excepting Sedum rubrotinctum, although toxicity has also been reported in some other species. [12]

Sedum reflexum, known as "prickmadam", "stone orpine", or "crooked yellow stonecrop", is occasionally used as a salad leaf or herb in Europe, including the United Kingdom.[13] It has a slightly astringent sour taste.

Sedum divergens, known as "spreading stonecrop", was eaten by First Nations people in Northwest British Columbia. The plant is used as a salad herb by the Haida and the Nisga'a people. It is common in the Nass Valley of British Columbia.[14]

Biting Stonecrop (Sedum acre) contains high quantities of piperidine alkaloids (namely (+)-sedridine, (−)-sedamine, sedinone and isopelletierine), which give it a sharp, peppery, acrid taste and make it somewhat toxic.

Roofing

Sedum can be used to provide a roof covering in green roofs,[15] where they are preferred to grasses.[16] Ford's Dearborn Truck Plant’s living roof has 10.4 acres (42,000 m2) of sedum. Rolls-Royce Motor Cars plant in Goodwood, England, has a 22,500 square metres (242,000 sq ft) roof complex covered in Sedum, the largest in the United Kingdom.[17] Nintendo of America's roof is covered in some 75,000 square feet of Sedum.[18]

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Hideaki Ohba. The taxonomic status of Sedum telephium and its allied species (Crassulaceae). Shokubutsu-gaku-zasshi March 1977, Volume 90, Issue 1, pp 41-56
  3. ↑ H. 't Hart and C. E. Jarvis. Typification of Linnaeus's Names for European Species of Sedum subgen. Sedum (Crassulaceae) Taxon Vol. 42, No. 2 (May, 1993), pp. 399-410
  4. ↑ H. 't Hart. Chromosome Numbers in Sedum (Crassulaceae) from Greece. Willdenowia Bd. 15, H. 1 (Jul. 30, 1985), pp. 115-135
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Björk, C. (2010). "Sedum valens (Crassulaceae), a new species from the Salmon River Canyon of Idaho". Madroño 57:2 136.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Plants of Coastal British Columbia, including Washington, Oregon, & Alaska, 2004, Jim Pojar and Andy MacKinnon, p. 157
  12. ↑ http://plants.ces.ncsu.edu/plants/all/sedum-spp/
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Plants of Coastal British Columbia, including Washington, Oregon, & Alaska, 2004, Jim Pojar and Andy MacKinnon, p. 156
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  18. ↑ http://kotaku.com/5834386/the-coolest-things-in-nintendos-american-headquarters-and-one-uncool-thing

External links

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