Biology:Sempervivum arachnoideum

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Short description: Species of succulent

Sempervivum arachnoideum
Sempervivum arachnoideum.jpg
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Saxifragales
Family: Crassulaceae
Genus: Sempervivum
Species:
S. arachnoideum
Binomial name
Sempervivum arachnoideum

Sempervivum arachnoideum, the cobweb house-leek,[1] is a species of flowering plant in the family Crassulaceae, native to European mountains, in the Alps, Apennines and Carpathians. Growing to 8 cm (3 in) tall by 30 cm (12 in) wide, it is a rosette-forming succulent perennial, valued in cultivation for its ability to colonise hot, dry areas via offsets.[2]

The specific epithet arachnoideum refers to its furry central rosettes (long ciliate leaf margins), resembling spider webs.[3]

It flowers in July, with pink flowers that are raised on stems and are hermaphroditic (having both male and female organs).

This plant,[4] and the subspecies Sempervivum arachnoideum subsp. tomentosum,[5] have gained the Royal Horticultural Society's Award of Garden Merit.[6]

References

  1. ↑ (xls) BSBI List 2007, Botanical Society of Britain and Ireland, https://bsbi.org/download/3542/, retrieved 2014-10-17 
  2. ↑ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. pp. 1136. ISBN 978-1405332965. 
  3. ↑ Harrison, Lorraine (2012). RHS Latin for gardeners. United Kingdom: Mitchell Beazley. pp. 224. ISBN 9781845337315. 
  4. ↑ "RHS Plant Selector - Sempervivum arachnoideum". https://www.rhs.org.uk/Plants/17075/Sempervivum-arachnoideum/Details. 
  5. ↑ "RHS Plantfinder - Sempervivum arachnoideum subsp. tomentosum". https://www.rhs.org.uk/Plants/44689/Sempervivum-arachnoideum-L-subsp-tomentosum-(C-B-Lehm-Schnittsp-)-Schinz-Thell/Details. 
  6. ↑ "AGM Plants - Ornamental". Royal Horticultural Society. July 2017. p. 96. https://www.rhs.org.uk/plants/pdfs/agm-lists/agm-ornamentals.pdf. Retrieved 9 November 2018. 

  • S. arachnoideum flower

  • Another flower

  • Characteristic "spider web" on rosettes

Wikidata ☰ Q161390 entry



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