Synthesis

Species description (Flora Helvetica 2018)

5-15 cm hoch. Rosetten klein, Durchmesser 0,5-2 cm, +/- geschlossen. Rosettenblätter lanzettlich, mit Drüsenhaaren, an den Spitzen durch weisse Haare spinnwebig verbunden. Blüten karminrot mit dunklerem Mittelstreifen, Durchmesser 1-2 cm. Kronblätter 6-12, kurz und fein zugespitzt, 2mal so lang wie die Kelchblätter.
Subsp. tomentosum mit besonders dichter, filziger Behaarung (Bild).

Flowering period (Flora Helvetica 2018)

6-8

Habitat and distribution inside Switzerland (Flora Helvetica 2018)

Felsen, steinige Orte, Mauerkronen, meist auf Silikat / (kollin-)montan-alpin / A

Ecological indicator (Landolt & al. 2010)

121-524.c.2n=32
.

Distribution map

Simple

Before threshold year
After threshold year
Before and after threshold year

Advanced

Colors
Validated observations
Observations waiting for validation
Occurrences from Atlas Welten & Sutter (1982) and supplements (1984, 1994) without confirmation in the Info Flora database since
Symbols
Before threshold year
After threshold year
Native
Reintroduced
Not native / introduced / subspontaneous / escaped
Doubtful

Number of observations

Below the threshold number of observations
Above or equal the threshold number of observations

Nomenclature

Vernacular name

Deutscher Name:
Spinnweb-Hauswurz
Nom français:
Joubarbe aranéeuse
Nome italiano:
Semprevivo ragnateloso

Match with other reference books

Relation Nom Book No
=Sempervivum arachnoideum L.Checklist 2017386700
=Sempervivum arachnoideum L.Flora Helvetica 2001880
=Sempervivum arachnoideum L.Flora Helvetica 2012255
=Sempervivum arachnoideum L.Flora Helvetica 2018255
=Sempervivum arachnoideum L.Index synonymique 1996386700
=Sempervivum arachnoideum L.Landolt 19771448
=Sempervivum arachnoideum L.Landolt 19911222
=Sempervivum arachnoideum L.SISF/ISFS 2386700
=Sempervivum arachnoideum L.Welten & Sutter 1982613

= The taxon corresponds to the accepted taxon (Checklist 2017)
< The taxon is included in the accepted taxon (Checklist 2017)
> The taxon includes (among others) also the accepted taxon (Checklist 2017)

Status

Native status   -  -

Status on national Red List 2016

flora.fl.statut_iucn:   Least concern

LC: Non menacé

flora.fl.complementary_informations

IUCN criteria: --

  • Legend
    EXExtinct
    RERegionally Extinct
    CR(PE)Critically Endangered, Probably Extinct
    CRCritically Endangered
    ENEndangered
    VUVulnerable
    NTNear Threatened
    LCLeast Concern

IUCN list of endangered species (Walter & Gillett 1997)

No

flora.fl.prio_title

flora.fl.prio_priority K - no national priority
flora.fl.prio_measures --
flora.fl.prio_responsability K - none
flora.fl.prio_monitor --

Protection status

International (Bern Convention) No
AI (13.03.1989)
FR (12.03.1973)
GL (28.04.1997)
Switzerland --
OW (18.12.1990)
TG (29.03.1994)

Ecology

Life form

Habitats

flora.fl.habitats_delarze

NO INFORMATION

Ecological indicator values by Landolt & al. (2010)

flora.fl.val_ecologique_sol flora.fl.val_ecologique_climat flora.fl.val_ecologique_salinite
flora.fl.val_ecologique_H 1 flora.fl.val_ecologique_L 5 flora.fl.val_ecologique_S --
flora.fl.val_ecologique_R 2 flora.fl.val_ecologique_T 2
flora.fl.val_ecologique_N 1 flora.fl.val_ecologique_C 4
  • flora.fl.val_ecologique_legende
    flora.fl.val_ecologique_H
    1flora.fl.val_ecologique_H_1
    1+flora.fl.val_ecologique_H_1plus
    2flora.fl.val_ecologique_H_2
    2+flora.fl.val_ecologique_H_2plus
    3flora.fl.val_ecologique_H_3
    3+flora.fl.val_ecologique_H_3plus
    4flora.fl.val_ecologique_H_4
    4+flora.fl.val_ecologique_H_4plus
    5flora.fl.val_ecologique_H_5
    ^flora.fl.val_ecologique_H_f
    Uflora.fl.val_ecologique_H_u
    Vflora.fl.val_ecologique_H_v
    wflora.fl.val_ecologique_W_2
    w+flora.fl.val_ecologique_W_3
    flora.fl.val_ecologique_R
    1flora.fl.val_ecologique_R_1
    2flora.fl.val_ecologique_R_2
    3flora.fl.val_ecologique_R_3
    4flora.fl.val_ecologique_R_4
    5flora.fl.val_ecologique_R_5
    flora.fl.val_ecologique_N
    1flora.fl.val_ecologique_N_1
    2flora.fl.val_ecologique_N_2
    3flora.fl.val_ecologique_N_3
    4flora.fl.val_ecologique_N_4
    5flora.fl.val_ecologique_N_5
    flora.fl.val_ecologique_salinite
    1flora.fl.val_ecologique_salinite_s
    3flora.fl.val_ecologique_salinite_ss
    flora.fl.val_ecologique_L
    1flora.fl.val_ecologique_L_1
    2flora.fl.val_ecologique_L_2
    3flora.fl.val_ecologique_L_3
    4flora.fl.val_ecologique_L_4
    5flora.fl.val_ecologique_L_5
    flora.fl.val_ecologique_T
    1flora.fl.val_ecologique_T_1
    1+flora.fl.val_ecologique_T_1plus
    2flora.fl.val_ecologique_T_2
    2+flora.fl.val_ecologique_T_2plus
    3flora.fl.val_ecologique_T_3
    3+flora.fl.val_ecologique_T_3plus
    4flora.fl.val_ecologique_T_4
    4+flora.fl.val_ecologique_T_4plus
    5flora.fl.val_ecologique_T_5
    flora.fl.val_ecologique_C
    1flora.fl.val_ecologique_C_1
    2flora.fl.val_ecologique_C_2
    3flora.fl.val_ecologique_C_3
    4flora.fl.val_ecologique_C_4
    5flora.fl.val_ecologique_C_5