Synthesis

Species description (Flora Helvetica 2018)

Ähnlich wie M. verticillatum, aber Stängel meist nicht über 1 m lang, untergetauchte Blattquirle meist mit nur 4 Blättern, diese mit 6-18 höchstens 1,5 cm langen und meist deutlich wechselständigen Abschnitten. Blüten gelb, Blütenstand armblütig, nur 0,5-3 cm lang, vor dem Aufblühen überhängend, obere (männliche) Blüten zu 1-2, untere weibliche Blüten zu 2-4 quirlständig. Obere Tragblätter ungeteilt, kürzer als die Blüten.

Flowering period (Flora Helvetica 2018)

7-9

Habitat and distribution inside Switzerland (Flora Helvetica 2018)

Stehende oder langsam fliessende, kalkfreie und nährstoffarme Gewässer / kollin-montan / Südliches TI, MZ

Ecological indicator (Landolt & al. 2010)

522-43+2.a.2n=14
Myriophyllum alterniflorum DC., © Konrad Lauber
.

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:
Armblütiges Tausendblatt
Nom français:
Myriophylle à fleurs alternes
Nome italiano:
Millefoglio d'acqua gracile

Match with other reference books

Relation Nom Book No
=Myriophyllum alterniflorum DC.Checklist 2017267600
=Myriophyllum alterniflorum DC.Flora Helvetica 20011255
=Myriophyllum alterniflorum DC.Flora Helvetica 2012319
=Myriophyllum alterniflorum DC.Flora Helvetica 2018319
=Myriophyllum alterniflorum DC.Index synonymique 1996267600
=Myriophyllum alterniflorum DC.Landolt 19772127
=Myriophyllum alterniflorum DC.Landolt 19911741
=Myriophyllum alterniflorum DC.SISF/ISFS 2267600
=Myriophyllum alterniflorum DC.Welten & Sutter 19821113

= 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:   Endangered

LC: Non menacé

flora.fl.complementary_informations

IUCN criteria: B2ab(iii)

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

Protection status

International (Bern Convention) No
Cantonal--
Switzerland --
  • 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.

Ecology

Life form

Habitats

flora.fl.habitats_delarze

Less strictly linked to a specific habitat 1.2.1 - Brachsmen- und Barbenregion (Epipotamon) (Ranunculion fluitantis)
Less strictly linked to a specific habitat 1.2.2 - Äschenregion (Hyporhithron) (Fontinalidion antipyreticae)

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)

flora.fl.val_ecologique_sol flora.fl.val_ecologique_climat flora.fl.val_ecologique_salinite
flora.fl.val_ecologique_H 5 flora.fl.val_ecologique_L 4 flora.fl.val_ecologique_S --
flora.fl.val_ecologique_R 2 flora.fl.val_ecologique_T 3+
flora.fl.val_ecologique_N 2 flora.fl.val_ecologique_C 2
  • 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