| 词条 | Sempervivum arachnoideum |
| 释义 |
|name = Sempervivum arachnoideum |image = Sempervivum_arachnoideum.jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Core eudicots |ordo = Saxifragales |familia = Crassulaceae |genus = Sempervivum |species = S. arachnoideum |binomial = Sempervivum arachnoideum | binomial_authority = L. }}Sempervivum arachnoideum, the cobweb house-leek,[1] is a species of flowering plant in the family Crassulaceae, native to the Alps, Apennines and Carpathians. Growing to {{convert|8|cm|0|abbr=on}} tall by {{convert|30|cm|0|abbr=on}} 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 hermaphrodite (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] References1. ^{{cite web |title=BSBI List 2007 |publisher=Botanical Society of Britain and Ireland |url=http://www.bsbi.org.uk/BSBIList2007.xls |format=xls |archive-url=https://www.webcitation.org/6VqJ46atN?url=http://www.bsbi.org.uk/BSBIList2007.xls |archive-date=2015-01-25 |accessdate=2014-10-17 |deadurl=yes |df= }} 2. ^{{cite book|title=RHS A-Z encyclopedia of garden plants|year=2008|publisher=Dorling Kindersley|location=United Kingdom|isbn=1405332964|pages=1136}} 3. ^{{cite book|last=Harrison|first=Lorraine|title=RHS Latin for gardeners|year=2012|publisher=Mitchell Beazley|location=United Kingdom|isbn=9781845337315|pages=224}} 4. ^{{cite web|title=RHS Plant Selector - Sempervivum arachnoideum|url=http://apps.rhs.org.uk/plantselector/plant?plantid=1824|accessdate=3 June 2013}} 5. ^{{cite web | url = https://www.rhs.org.uk/Plants/44689/i-Sempervivum-arachnoideum-i-L-subsp-i-tomentosum-i-(C-b-Lehm-Schnittsp-)-Schinz-Thell/Details | title = RHS Plantfinder - Sempervivum arachnoideum subsp. tomentosum | accessdate = 9 November 2018}} 6. ^{{cite web | url = https://www.rhs.org.uk/plants/pdfs/agm-lists/agm-ornamentals.pdf | title = AGM Plants - Ornamental | date = July 2017 | page = 96 | publisher = Royal Horticultural Society | accessdate = 9 November 2018}} 2 : Sempervivum|Plants described in 1753 |
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