Sempervivum arachnoideum

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Sempervivum arachnoideum
Sempervivum arachnoideum.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Core eudicots
Order: Saxifragales
Family: Crassulaceae
Genus: Sempervivum
Species: S. arachnoideum
Binomial name
Sempervivum arachnoideum

Sempervivum arachnoideum, sometimes known as cobweb house-leek,[1] is a species of flowering plant in the family Crassulaceae, native to 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] Its name arachnoideum refers to its furry central rosettes, resembling spider webs.[3] It flowers in July, with pink flowers that are raised on stems and hermaphrodite (having both male and female organs).

This plant has gained the Royal Horticultural Society's Award of Garden Merit.[4]


  1. ^ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-02-25. Retrieved 2014-10-17. 
  2. ^ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964. 
  3. ^ Harrison, Lorraine (2012). RHS Latin for gardeners. United Kingdom: Mitchell Beazley. p. 224. ISBN 9781845337315. 
  4. ^ "RHS Plant Selector - Sempervivum arachnoideum". Retrieved 3 June 2013.