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Sempervivum arachnoideum
  • Cobweb Houseleek

a perennial evergreen member of the Sempervivum genus in the family Crassulaceae.

248px
Niche
  • Unknown
    Unknown
    The ecosystem niches for this plant are unknown. Do you know them? Click the edit button to add them!
Functions
  • None
    None
    There are no functions defined for this plant. Do you know of some? Click the edit button to add them!
Light
  • Full sun
    Full sun
    The amount of sun exposure that a plant prefers in ideal conditions.
    Key
  • no shade
    No shade
    The amount of shade a plant will tolerate without adverse health affects.
    Key
Water
  • Water Requirementsmoderate
    Moderate
    The amount of water a plant needs for healthy growth, relative to other plants.
    Key
Soil
  • very acid,acid,neutral,alkaline
    Very acid to Alkaline
    The PH range (acidity or alkilinity) of the growth medium ideal for healthy nutrient absorbtion.
    Key
  • Sandy to Loamy
    The soil texture this plant prefers for optimal growth.
    Key
Cold & Heat
  • 5
    Zone 5
    The USDA Hardiness scale assigns plants a number from 1 to 12 representing the minimum temperature a plant can survive.
    Key
    0< -53.9ºC< -65ºF
    1-51.1ºC-60ºF
    2-45.6ºC-50F
    3-40ºC-40ºF
    4-34.4ºC-30ºF
    5-28.9ºC-20ºF
    6-23.3ºC-10ºF
    7-17.8ºC0ºF
    8-12.2C10ºF
    9-6.7ºC20ºF
    10-1.1ºC30ºF
    114.4ºC40ºF
    12> 10ºC> 5ºF
  • ?
    Unknown
    The AHS Heat scale assigns plants a number from 1 to 12 representing the number of days per year a plant requires a temperature exceeding 30ºC (86ºF).
    Key
    11
    21 - 7
    38 - 14
    415 - 30
    531 - 45
    646 - 60
    761 - 90
    891 - 120
    9121 - 150
    10151 - 180
    11181 - 210
    12181 - 210
Sempervivum arachnoideum has 0 medicinal uses listed

Uses

Edible uses

There are no edible uses listed for Sempervivum arachnoideum.

Material uses

There are no material uses listed for Sempervivum arachnoideum.

Medicinal uses(Warning!)

The leaves are emollient, haemostatic, ophthalmic and sedative[1]. The crushed plant, or its juice, is applied externally to boils, wounds etc and is also used to stop nose bleeds[1]. The slightly warmed juice has been used to relieve ear inflammations and toothaches can be relieved by chewing on the leaves[1]. When macerated and infused in vinegar, the plant can be used to get rid of warts and corns[1]. The leaves are harvested in the summer and are best used when fresh since they are difficult to dry properly[1]. The leaf pulp is used to make a cooling face mask for reddened or sunburnt skin[1].

Unknown part

Emollient
Haemostatic
Odontalgic
Ophthalmic
Sedative
Skin

Ecology

Ecosystem niche/layer

Ecological Functions

Nothing listed.

Forage

Nothing listed.

Shelter

Nothing listed.

Propagation

Seed - surface sow in early spring in a cold frame. It usually germinates in 2 - 6 weeks at 10°c. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the greenhouse for their first winter. Plant them out into their permanent positions in the summer if they have made sufficient growth, otherwise grow them on for a further year in pots before planting them out[K].

Division of offsets in spring or early summer. Larger divisions can be planted out direct into their permanent positions. We have found it best to pot up the smaller divisions and grow them on in a lightly shaded position in a cold frame, planting them out once they are well established in the summer. Plants can also be divided in September but these divisions should be overwintered in a greenhouse.

Stem cuttings.

Practical Plants is currently lacking information on propagation instructions of Sempervivum arachnoideum. Help us fill in the blanks! Edit this page to add your knowledge.



Cultivation

Prefers a well-drained gritty soil in full sun[2]. Succeeds in any sandy soil, doing well in very little soil in rock crevices, walls, paths etc so long as there is sufficient humus[3][2]. Prefers growing on acid rocks, though it also succeeds on calcareous ones[4]. Established plants are drought tolerant[2]. Strongly dislikes winter wet[2]. Plants are not very tolerant of weed competition[K].

Polymorphic, this species is split into a number of sub-species by some botanists[2]. Individual rosettes die after flowering, but produce a number of offsets that continue to grow[5].

Hybridizes with a number of other members of this genus[2].

Crops

Problems, pests & diseases

Associations & Interactions

There are no interactions listed for Sempervivum arachnoideum. Do you know of an interaction that should be listed here? edit this page to add it.

Polycultures & Guilds

There are no polycultures listed which include Sempervivum arachnoideum.

Descendants

Cultivars

Varieties

None listed.

Subspecies

None listed.

Full Data

This table shows all the data stored for this plant.

Taxonomy
Binomial name
Sempervivum arachnoideum
Genus
Sempervivum
Family
Crassulaceae
Imported References
Edible uses
Medicinal uses
[1]
Material uses & Functions
Botanic
[2]
Propagation
Cultivation
Environment
Cultivation
Uses
Edible uses
None listed.
Material uses
None listed.
Medicinal uses
None listed.
Functions & Nature
Functions
Provides forage for
Provides shelter for
Environment
Hardiness Zone
5
Heat Zone
?
Water
moderate
Sun
full sun
Shade
no shade
Soil PH
very acid, acid, neutral, alkaline
Soil Texture
sandy, loamy
Soil Water Retention
well drained
Environmental Tolerances
  • Drought
Ecosystems
Native Climate Zones
None listed.
Adapted Climate Zones
None listed.
Native Geographical Range
None listed.
Native Environment
None listed.
Ecosystem Niche
None listed.
Root Zone Tendancy
None listed.
Life
Deciduous or Evergreen
evergreen
Herbaceous or Woody
?
Life Cycle
perennial
Growth Rate
?
Mature Size
0.1 x 0.15 meters
Fertility
?
Pollinators
Insects
Flower Colour
?
Flower Type
hermaphrodite

"image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki. "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki. "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki.

"image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki. "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki.


"image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki.

"image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki.

"image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki., "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki., "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki., "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki. "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki., "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki. "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki. "image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki."image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki.






References

  1. ? 1.01.11.21.31.41.51.6 Chiej. R. Encyclopaedia of Medicinal Plants. MacDonald ISBN 0-356-10541-5 (1984-00-00)
  2. ? 2.02.12.22.32.42.52.6 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
  3. ? F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press (1951-00-00)
  4. ? Grey-Wilson. C. & Matthews. V. Gardening on Walls Collins ISBN 0-00-219220-0 (1983-00-00)
  5. ? Brickell. C. The RHS Gardener's Encyclopedia of Plants and Flowers Dorling Kindersley Publishers Ltd. ISBN 0-86318-386-7 (1990-00-00)

"image:Sempervivum arachnoideum flower.jpg|248px" cannot be used as a page name in this wiki.

Retrieved from "https://practicalplants.org/w/index.php?title=Sempervivum_arachnoideum&oldid=80837"
Facts about "Sempervivum arachnoideum"RDF feed
Article is incompleteYes +
Article requires citationsNo +
Article requires cleanupYes +
Belongs to familyCrassulaceae +
Belongs to genusSempervivum +
Has binomial nameSempervivum arachnoideum +
Has common nameCobweb Houseleek +
Has drought toleranceTolerant +
Has environmental toleranceDrought +
Has fertility typeInsects +
Has flowers of typeHermaphrodite +
Has hardiness zone5 +
Has imageSempervivum arachnoideum flower.jpg +
Has lifecycle typePerennial +
Has mature height0.1 +
Has mature width0.15 +
Has medicinal partUnknown part +
Has medicinal useEmollient +, Haemostatic +, Odontalgic +, Ophthalmic +, Sedative + and Skin +
Has primary imageSempervivum arachnoideum flower.jpg +
Has search namesempervivum arachnoideum + and cobweb houseleek +
Has shade toleranceNo shade +
Has soil ph preferenceVery acid +, Acid +, Neutral + and Alkaline +
Has soil texture preferenceSandy + and Loamy +
Has soil water retention preferenceWell drained +
Has sun preferenceFull sun +
Has taxonomic rankSpecies +
Has taxonomy nameSempervivum arachnoideum +
Has water requirementsmoderate +
Is deciduous or evergreenEvergreen +
Is taxonomy typeSpecies +
PFAF cultivation notes migratedNo +
PFAF edible use notes migratedYes +
PFAF material use notes migratedYes +
PFAF medicinal use notes migratedNo +
PFAF propagation notes migratedNo +
PFAF toxicity notes migratedYes +
Tolerates nutritionally poor soilNo +
Uses mature size measurement unitMeters +
Has subobjectThis property is a special property in this wiki.Sempervivum arachnoideum +, Sempervivum arachnoideum +, Sempervivum arachnoideum +, Sempervivum arachnoideum +, Sempervivum arachnoideum + and Sempervivum arachnoideum +