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Carex dioica L.

Species
SIFS: 86200
Checklist: 1009620

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 (© Flora Helvetica 2018)

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

Status

IUCN status

 Vulnerable (VU)

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 (Atlas)

Dataset last updated:
Data is updated once a day, whenever possible.

Simple

Before threshold year
From 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
From 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
Symbols
Valley surfaces Mountain surfaces
Abundant or frequent presence
Scarce or rare presence
H Herbarium sample
L Mentioned in the litterature
Colors
Occurrences from Atlas Welten & Sutter (1982)
Occurrences from supplements 1984
Occurrences from supplements 1994

Distribution in Switzerland (© Flora Helvetica 2018)

CH (fehlt TI)

World distribution (© Flora Helvetica 2018)

Eurosibirisch

Ecology

Life form

Geophyte

Habitats

Habitats © Delarze & al. 2015

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

1
very dry
1+
dry
2
moderatly dry
2+
moist
3
medium wet
3+
wet
4
very wet
4+
soggy
5
submerged or underwater
f
plants living in running water
u
mostly submerged plants
v
partly submerged, partly floating plants
w
humidity moderately variable (± scale of 1-2)
w+
highly variable humidity (scale exceeding ± 2)

Reaction Value R

1
Very acid (pH 2.5-5.5)
2
acid (pH 3.5-6.5)
3
lightly acid to neutral (pH 4.5-7.5)
4
neutral to basic (pH 5.5-8.5)
5
basic (pH 6-5 -> 8.5

Nutriments value N

1
very low in nutrients
2
low in nutriments
3
medium-poor to medium-rich in nutrients
4
rich in nutriments
5
very rich in nutriments

Salinity tolerance

1
halotolerant
3
halophyle

Light Value L

1
very shady
2
shady
3
lighted areas
4
luminous
5
highly luminous

Temperature factor T

1
alpine to nival stages (from the treeline to the snowline)
1+
suprasubalpine and upper subalpine levels (pine and larch forests)
2
subalpine level (coniferous forests without beeches up to the upper limit of spruces)
2+
lower subalpine and upper mountain stages
3
mountain level (beech and silver fir forests, in the central Alps Scots pine forests)
3+
lower mountain and upper hill levels
4
hill level (mixed deciduous oak forests)
4+
hot places, hill level
5
very hot places, hill level (only in the hottest places, typical of southern Europe)

Continentality K

1
Atlantic (high air humidity, very low temperature variations, mild winters)
2
Sub-Atlantic (high air humidity, low temperature variations, relatively mild winters)
3
sub-Atlantic to subcontinental (average air humidity, moderately variable temperature, slightly low winter temperatures)
4
subcontinental (low air humidity, large temperature variations, rather cold winters)
5
continental (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

Relationship Scientific name Book No
=Carex dioica L.Checklist 201786200
=Carex dioica L.Flora alpina 2004138.17.24
=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

IUCN status: Vulnerable

Vulnerable

Additional information

IUCN criteria: B2ab(iii)

Status on regional Red List 2019

Biogeographic regions IUCN status IUCN criteria
Jura (JU) VUA3c
Mittelland (MP) ENA3c
Alpennordflanke (NA) VUA3c
Alpensüdflanke (SA) VUA3c
Östliche Zentralalpen (EA) VUA3c
Westliche Zentralalpen (WA) VUA3c
Legend
EX
Extinct
RE
Regionally Extinct
CR(PE)
Critically Endangered, Probably Extinct
CR
Critically Endangered
EN
Endangered
VU
Vulnerable
NT
Near Threatened
LC
Least Concern
DD
Data Deficient
NE
Not Evaluated
NA
Not Applicable

National Priority Species List Status

Action level LF (+GL) - Spezifische Lebensraumförderung
Notice on action level
Population monitoring 2 - genügend
International responsibility of Switzerland 4 - Verantwortung
Urgency 2 - notwendig und wichtig
Protection of individual occurrences

Protection status

International (Bern Convention) No
VDtotal protection (29.05.2025)
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.

Crop Wild Relatives

CWR specie

Conservation

Threats and measures