Synthesis

Species description (Flora Helvetica 2018)

Wasserpflanze, im Schlamm wurzelnd, Stängel und Blätter untergetaucht. Blätter kammartig-fiederschnittig, Abschnitte bis 5 cm lang und 1,5 mm breit. Blütenstand aufrecht, aus dem Wasser ragend, aus übereinander stehenden Quirlen bestehend. Blüten weiss oder hellrosa, mit gelbem Schlund, Krone weit trichterförmig bis flach ausgebreitet, mit 7-9 mm langen Zipfeln. Kapsel ca. 5 mm lang.

Flowering period (Flora Helvetica 2018)

5-7

Habitat and distribution inside Switzerland (Flora Helvetica 2018)

Altwässer, Gräben / kollin / M, J, AN, auch oft angesiedelt

World distribution (Flora Helvetica 2018)

Europäisch-westasiatisch

Ecological indicator (Landolt & al. 2010)

5w+33-34+3.a.2n=20
.

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

Ecology

Life form

Hydrophyte

Habitats

Habitats Delarze & al. 2015

Character species 1.1.4 - Schwimmblattgesellschaft (Nymphaeion)

bold Dominant species, influencing the appearance of the habitat
Character species Character species
Less strictly linked to a specific habitat Less strictly linked to a specific habitat

Ecological indicator values by Landolt & al. (2010)

Soil factors Climatic factors Salinity tolerance
Humidity Value H 5w+ Light Value L 3 Salinity Index --
Reaction Value R 3 Temperature factor T 4+
Nutriments value N 3 Continentality K 3
  • Ecological values legend
    Humidity Value H
    1very dry
    1+dry
    2moderatly dry
    2+moist
    3medium wet
    3+wet
    4very wet
    4+soggy
    5submerged or underwater
    fplants living in running water
    umostly submerged plants
    vpartly submerged, partly floating plants
    whumidity moderately variable (± scale of 1-2)
    w+highly variable humidity (scale exceeding ± 2)
    Reaction Value R
    1Very acid (pH 2.5-5.5)
    2acid (pH 3.5-6.5)
    3lightly acid to neutral (pH 4.5-7.5)
    4neutral to basic (pH 5.5-8.5)
    5basic (pH 6-5 -> 8.5
    Nutriments value N
    1very low in nutrients
    2low in nutriments
    3medium-poor to medium-rich in nutrients
    4rich in nutriments
    5very rich in nutriments
    Salinity tolerance
    1halotolerant
    3halophyle
    Light Value L
    1very shady
    2shady
    3lighted areas
    4luminous
    5highly luminous
    Temperature factor T
    1alpine to nival stages (from the treeline to the snowline)
    1+suprasubalpine and upper subalpine levels (pine and larch forests)
    2subalpine level (coniferous forests without beeches up to the upper limit of spruces)
    2+lower subalpine and upper mountain stages
    3mountain level (beech and silver fir forests, in the central Alps Scots pine forests)
    3+lower mountain and upper hill levels
    4hill level (mixed deciduous oak forests)
    4+hot places, hill level
    5very hot places, hill level (only in the hottest places, typical of southern Europe)
    Continentality K
    1Atlantic (high air humidity, very low temperature variations, mild winters)
    2Sub-Atlantic (high air humidity, low temperature variations, relatively mild winters)
    3sub-Atlantic to subcontinental (average air humidity, moderately variable temperature, slightly low winter temperatures)
    4subcontinental (low air humidity, large temperature variations, rather cold winters)
    5continental (very low air humidity, very large temperature variations, cold winters)

Water dependency

Rivers 1 - Secondary habitat
Calm water 2 - Essential habitat
Ground water 0 - No link

Nomenclature

Vernacular name

Deutscher Name:
Wasserfeder
Nom français:
Millefeuille aquatique, Hottonie des marais
Nome italiano:
Fertro, Erba scopina

Match with other reference books

Relation Nom Book No
=Hottonia palustris L.Checklist 2017208600
=Hottonia palustris L.Flora Helvetica 2001835
=Hottonia palustris L.Flora Helvetica 20121379
=Hottonia palustris L.Flora Helvetica 20181379
=Hottonia palustris L.Index synonymique 1996208600
=Hottonia palustris L.Landolt 19772290
=Hottonia palustris L.Landolt 19911864
=Hottonia palustris L.SISF/ISFS 2208600
=Hottonia palustris L.Welten & Sutter 19821260

= 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

IUCN status:   Endangered

LC: Non menacé

Additional information

IUCN criteria: B2ab(iii,iv)

Status on regional Red List 2019

Biogregraphic regions Status IUCN criteria
Jura (JU) ENB2ab(iii,iv)
Mittelland (MP) ENB2ab(iii,iv)
Alpennordflanke (NA) ENB2ab(iii,iv)
Westliche Zentralalpen (WA) RE
Östliche Zentralalpen (EA) --
Alpensüdflanke (SA) --
  • 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

National Priority Species List Status

National Priority 3 - medium national priority
Need to take action 2 -
International responsibility 1 - weak
Need to monitor populations 2 -

Protection status

International (Bern Convention) No
BEtotal protection (01.01.2016)
Switzerland --
VDtotal protection (02.03.2005)
  • Disclaimer
    InfoFlora compiles information on protected species as accurately as possible, taking it from the respective cantonal laws. In some cases, however, it was not possible to use the plant names as listed in the original text, but an interpretation of their taxonomy or nomenclature was necessary. The exact meaning of the categories „completely protected“ and „partially protected“ differs among the cantons.

    InfoFlora cannot guarantee that the information on the protection status is correct and complete. In case of doubts, we recommend to look up the texts of the respective cantonal law.

Threats and measures

Populations isolées et peu nombreuses

Protéger les stations et les zones tampon (p. ex. micro-réserves)
Effectuer des contrôles réguliers
Multiplier de manière ex-situ à partir de matériel indigène (graines), réintroduire dans des stations d'origine ou potentielles, renforcer des populations déjà existantes (réintroduire les plantes directement dans des substrats boueux)
Garantir le suivi de l'efficacité des mesures

Eutrophisation (agriculture, pêche professionnelle avec nourrissage, pollution des eaux, prolifération des algues)

Poursuivre les mesures de réduction de la teneur en nutriments des lacs
Etablir de grandes zones tampons
Empêcher les pollutions

Manque de formation de nouveaux bras morts, succession naturelle

Libérer des vallées alluviales pour favoriser la dynamique naturelle (tout en préservant les populations existantes)
Créer périodiquement des milieux favorables (étangs)

Destruction de l'habitat (drainage, assainissement, endiguement)

Interdire toute modification néfaste à l'espèce dans les stations actuelles
Optimiser d’abord le régime hydrique (favoriser la saturation constante des couches supérieures du sol), et ensuite de définir un entretien en faveur des espèces cibles

Croisement avec des plantes d’origine inconnue

Ne tolérer que du matériel de provenance indigèneslors d'introductions

Concurrence (fermeture des sites par le roseau et les grandes laiches)

Mettre en place un dragage tous les deux ans
Couper entre deux les plantes concurrentes sous la surface de l'eau

Activités de loisirs (navigation, baignade, pêche à la ligne)

Établir des zones protégées
Canaliser le public

Changement vers une vitesse d'écoulement trop élevée

Empêcher l'augmentation de la vitesse d'écoulement

In-situ measures

More informations

Species conservation

Conservation fact sheet (in german)