Catabrosa aquatica (L.) P. Beauv.

Catabrosa aquatica (L.) P. Beauv.

ISFS : 97300
Checklist : 1010650


Species description (© Flora Helvetica 2018)

Stängel 20-60 cm, weich, hohl, niederliegend und flutend oder aufsteigend, an den Knoten wurzelnd. Blätter 5-10 mm breit, stumpf. Blatthäutchen 2-5 mm lang, stumpf. Blütenstand eine lockere, bis 25 cm lange Rispe. Äste mit mehreren grundständigen Zweigen. Ährchen meist 2blütig, 2-3 mm lang, meist violett. Hüllspelzen häutig, die 1nervige untere kürzer als die 3nervige obere. Deckspelze mindestens doppelt so lang wie die obere Hüllspelze, ca. 2,5 mm lang, häutig, gestutzt und gezähnt, auf dem Rücken gerundet, unbegrannt.

Flowering period (© Flora Helvetica 2018)


Habitat and distribution inside Switzerland (© Flora Helvetica 2018)

Ufer von klaren Bächen / kollin-subalpin / Zerstreut CH, besonders GR

World distribution (© Flora Helvetica 2018)


Ecological indicator (© Flora Helvetica 2018)



IUCN status


National Priority

 4 - weak national priority

International responsibility

 1 - weak


Summary of leaf anatomy (German)

Obere Epidermiszellen gleich gross wie untere. Epidermis mit Papillen. Verbindungs-Steg zwischen oberer und unterer Epidermis aus verholzten und nicht verholzten Zellen. Leitbündel im Verbindungs-Steg in der Mitte eingebettet. Leitbündelhülle verholzt.

Summary of stem anatomy (German)

Umriss rund gewellt. Leitbündel in einer Reihe. Epidermiszellen nicht verholzt.


Culm-diameter 1-2 mm, wall thin, radius of culm in relation to wall thickness approximately 1:0.25 or < 0.25. Outline circular wavy. Culm-center hollow and surrounded by many large thin-walled, not lignified cells. Epidermis-cells thin-walled all around. Large vascular bundles arranged in one peripheral row. Chlorenchyma absent. Sclerenchyma in a small, peripheral continuous belt (< 4 cells). Cells medium thick-walled. Small sclerenchymatic sheath with 1-2 cells around vascular bundles. Largest vessels in vascular bundles in lateral position. Largest vessel in the bundle 20-50 μm. Distinct cavities (intercellulars) in the protoxylem area of vascular bundles.

Distribution map


Before threshold year
After threshold year
Before and after threshold year


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

Number of observations

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

Habitat and distribution inside Switzerland

Zerstreut CH, besonders GR

World distribution



Life form



Habitats © Delarze & al. 2015

Less strictly linked to a specific habitat 2.1.4 - Bachröhricht (Glycero-Sparganion)

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 4+fw+ Light Value L 4 Salinity Index 1
Reaction Value R 4 Temperature factor T 3
Nutriments value N 4 Continentality K 3
  • Ecological values legend
    Humidity Value H
    1very dry
    2moderatly dry
    3medium wet
    4very wet
    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
    Light Value L
    1very shady
    3lighted areas
    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 2 - Essential habitat
Calm water 0 - No link
Ground water 0 - No link


Accepted Name (Checklist 2017)

Catabrosa aquatica (L.) P. Beauv.

Vernacular name

Deutscher Name :

Europäisches Quellgras

Nom français :

Catabrosa aquatique

Nome italiano :

Gramignone di palude

Match with other reference books

Relation Nom Book No
=Catabrosa aquatica (L.) P. Beauv.Checklist 201797300
=Catabrosa aquatica (L.) P. Beauv.Flora Helvetica 20012640
=Catabrosa aquatica (L.) P. Beauv.Flora Helvetica 20122816
=Catabrosa aquatica (L.) P. Beauv.Flora Helvetica 20182816
=Catabrosa aquatica (L.) P. Beauv.Index synonymique 199697300
=Catabrosa aquatica (L.) P. Beauv.Landolt 1977300
=Catabrosa aquatica (L.) P. Beauv.Landolt 1991263
=Catabrosa aquatica (L.) P. Beauv.SISF/ISFS 297300
=Catabrosa aquatica (L.) P. Beauv.Welten & Sutter 19822233
= 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)


Native status


IUCN list of endangered species (© Walter & Gillett 1997) : No

Status on national Red List 2016

IUCN status:



Additional information

IUCN criteria: A2c

Status on regional Red List 2019

Biogregraphic regions Status IUCN criteria
Jura (JU) ENA2c; B2ab(iii)
Mittelland (MP) ENA2c; B2ab(iii)
Alpennordflanke (NA) ENA2c; B2abc(iii)
Alpensüdflanke (SA) RE
Östliche Zentralalpen (EA) VUA2c; B2ab(iii)
Westliche Zentralalpen (WA) RE
  • Legend
    RERegionally Extinct
    CR(PE)Critically Endangered, Probably Extinct
    CRCritically Endangered
    NTNear Threatened
    LCLeast Concern
    DDData Deficient
    NENot Evaluated
    NANot Applicable

National Priority Species List Status

National Priority 4 - weak national priority
Need to take action 1 -
International responsibility 1 - weak
Need to monitor populations 1 -

Protection status

International (Bern Convention) No
NWtotal protection (29.11.2005)
VDtotal protection (02.03.2005)
Switzerland --
TItotal protection (23.01.2013)
GEtotal protection (25.07.2007)
  • 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.

Status by sector of activity

Agriculture-related environmental objectives : Z - more informations


Threats and measures

In-situ measures

More informations

F. Perriat, 2015: Plan de conservation dans le Val d'Oise - Catabrosa aquatica (L.) P.Beauv., 1812