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Carex dioica L.

Carex dioica L.

Species
ISFS : 86200
Checklist : 1009620
  1. Cyperaceae
  2. Carex
  3. Carex dioica L.

Synthesis

Species description (© Flora Helvetica 2018)

Ähnlich wie C. davalliana, aber Wuchs locker (mit unterirdischen Ausläufern), Stängel und Blätter glatt, weibliche Ähre meist weniger als 1 cm lang, dichtblütig, Fruchtschläuche nur ca. 3 mm lang, nicht rückwärts gerichtet.

Flowering period (© Flora Helvetica 2018)

4(-7)

Habitat and distribution inside Switzerland (© Flora Helvetica 2018)

Flachmoore / kollin-subalpin / CH (fehlt TI)

World distribution (© Flora Helvetica 2018)

Eurosibirisch

Ecological indicator (© Landolt & al. 2010)

4+w32-433.g.2n=52

Status

IUCN status

 Vulnerable

National Priority

 4 - weak national priority

International responsibility

 1 - weak

Anatomy

Summary of leaf anatomy (German)

Rechteckige Stützen. Leitbündel in einer Reihe. Epidermiszellen aussen verholzt.

Summary of stem anatomy (German)

Umriss rund oder oval. Leitbündel in einer Reihe. Rechteckige Stützen. Grosse unregelmässige Intercellularen. Epidermiszellen aussen verholzt.

Description

Culm-diameter 0.5-1 mm, wall large, radius of culm in relation to wall thickness approximately 1: 0.5. Outline oval. Culm-center hollow and surrounded by a few thin-walled, not lignified cells. Epidermis cells inside thin, peripheral thicker-walled (lignified). Guard cells with externally acute ledge. Large vascular bundles arranged in one peripheral row. Chlorenchyma in round, oval, square or rectangular groups. Sclerenchyma belt absent. Groups of sclerenchyma square or rectangular. Vascular bundles collateral closed. Small sclerenchymatic sheath around vascular bundles with 1-2 cells. Vessels arrangement in vascular bundles in lateral position. Largest vessel in the bundle small, < 20μm. Cavities (intercellulars) between parenchyma-cells round, oval or radial. Distinct cavities (intercellulars) in the protoxylem area of vascular bundles. Crystals absent.

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

Habitat and distribution inside Switzerland

CH (fehlt TI)

World distribution

Eurosibirisch

Ecology

Life form

Geophyte

Habitats

Habitats © Delarze & al. 2015

Character species 2.2.3 - Kalkreiches Kleinseggenried (Davallseggenried) (Caricion davallianae)

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+w Light Value L 4 Salinity Index --
Reaction Value R 3 Temperature factor T 3
Nutriments value N 2 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 0 - No link
Calm water 1 - Secondary habitat
Ground water 0 - No link

Nomenclature

Accepted Name (Checklist 2017)

Carex dioica L.

Vernacular name

Deutscher Name :

Zweihäusige Segge

Nom français :

Laîche dioïque

Nome italiano :

Carice dioica

Match with other reference books

Relation Nom Book No
=Carex dioica L.Checklist 201786200
=Carex dioica L.Flora Helvetica 20012510
=Carex dioica L.Flora Helvetica 20122686
=Carex dioica L.Flora Helvetica 20182686
=Carex dioica L.Index synonymique 199686200
=Carex dioica L.Landolt 1977461
=Carex dioica L.Landolt 1991404
=Carex dioica L.SISF/ISFS 286200
=Carex dioica L.Welten & Sutter 19822442
= 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

-

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

Status on national Red List 2016

IUCN status:

 Vulnerable

Vulnerable

Additional information

IUCN criteria: B2ab(iii)

Status on regional Red List 2019

Biogregraphic regions Status IUCN criteria
Jura (JU) VUA3c
Mittelland (MP) ENA3c
Alpennordflanke (NA) VUA3c
Alpensüdflanke (SA) VUA3c
Östliche Zentralalpen (EA) VUA3c
Westliche Zentralalpen (WA) VUA3c
  • Legend
    EXExtinct
    RERegionally Extinct
    CR(PE)Critically Endangered, Probably Extinct
    CRCritically Endangered
    ENEndangered
    VUVulnerable
    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
VDtotal protection (02.03.2005)
Switzerland --
TItotal protection (23.01.2013)
  • 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.

Conservation

Threats and measures