Synthesis

Species description (Flora Helvetica 2018)

Wasserpflanze mit schwimmender Blattrosette und flutendem oder kriechendem, bis 3 m langem Stängel, dieser mit gegenständigen, fiederig verzweigten Wurzeln. Blätter rhombisch, 2-6 cm lang, vorn grob buchtig gezähnt, lederig, oberseits glänzend, unterseits meist rotbraun, Stiel spindelförmig aufgebläht. Blüten weiss, 4teilig, weniger als 1 cm lang, in den Blattwinkeln, gestielt. Frucht holzig, braun bis schwarz, mit Zacken und Hörnern, 2-3 cm hoch und 2-4 cm breit.

Flowering period (Flora Helvetica 2018)

8

Habitat and distribution inside Switzerland (Flora Helvetica 2018)

Stehende, 1-2 m tiefe Gewässer / kollin / Südliches TI, JN

Ecological indicator (Landolt & al. 2010)

5v23-44+4.s.2n=36,40,48
.

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:
Wassernuss
Nom français:
Châtaigne d'eau, Macre flottante
Nome italiano:
Castagna d'acqua

Match with other reference books

Relation Nom Book No
=Trapa natans L.Checklist 2017423500
=Trapa natans L.Flora Helvetica 20011256
=Trapa natans L.Flora Helvetica 20121029
=Trapa natans L.Flora Helvetica 20181029
=Trapa natans L.Index synonymique 1996423500
=Trapa natans L.Landolt 19772124
=Trapa natans L.Landolt 19911738
=Trapa natans L.SISF/ISFS 2423500
=Trapa natans L.Welten & Sutter 19821087

= 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:   Critically endangered

LC: Non menacé

flora.fl.complementary_informations

IUCN criteria: C2a(ii)

  • 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 2 - high national priority
flora.fl.prio_measures 2 -
flora.fl.prio_responsability 1 - weak
flora.fl.prio_monitor 2 -

Protection status

International (Bern Convention) Yes
TI (01.07.1975)
Switzerland --

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 5v flora.fl.val_ecologique_L 4 flora.fl.val_ecologique_S --
flora.fl.val_ecologique_R 2 flora.fl.val_ecologique_T 4+
flora.fl.val_ecologique_N 3 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