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Panicum dichotomiflorum Michx.
Panicum dichotomiflorum Michx., © Konrad Lauber
Panicum dichotomiflorum Michx., © Konrad Lauber

Panicum dichotomiflorum Michx.

Species
ISFS : 290400
Checklist : 1032370
  1. Poaceae
  2. Panicum
  3. Panicum dichotomiflorum Michx.

Synthesis

Species description (© Flora Helvetica 2018)

Unterscheidet sich von P. capillare durch folgende Merkmale: Blattscheiden kahl (bei P. capillare Scheiden und oft auch die Spreiten abstehend behaart), Rispenäste gebogen, die Ährchen längs der Äste verteilt (bei P. capillare nur in der äusseren Hälfte der Äste), 2,5-3 mm lang und 1 mm breit, die untere Hüllspelze 1/4-1/3 so lang wie das Ährchen, fein hautrandig.

Flowering period (© Flora Helvetica 2018)

8-10

Habitat and distribution inside Switzerland (© Flora Helvetica 2018)

Ufer, Maisfelder / kollin / M, JN u.a., in rascher Ausbreitung begriffen

World distribution (© Flora Helvetica 2018)

Stammt aus Nordamerika

Ecological indicator (© Landolt & al. 2010)

2+34-34+2.t.2n=54

Anatomy

text alt
Stems, 100x
text alt
Stems 400x

Summary of stem anatomy (German)

Umriss rund mit Rippen. Leitbündel in mehreren Reihen. Epidermiszellen verholzt.

Description

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 a few thin-walled, not lignified cells. Epidermis-cells thin-walled all around. Large vascular bundles arranged in 2-3 peripheral rows. Chlorenchyma very small in 1-3 lined-up cells. Sclerenchyma in a small, peripheral continuous belt (< 4 cells). Cells thick-walled. Sclerenchymatic sheath around vascular bundles large, 3 to x cells. Largest vessels in vascular bundles in lateral position. Largest vessel in the bundle small, < 20μm. Cavities (intercellulars) between parenchyma-cells present, small, often triangular. Distinct cavities (intercellulars) in the protoxylem area of vascular bundles.

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

M, JN u.a., in rascher Ausbreitung begriffen

World distribution

Stammt aus Nordamerika

Ecology

Life form

Therophyte

Habitats

Habitats © Delarze & al. 2015

Less strictly linked to a specific habitat 8.2.3.3 - Kalkarmer, trockener Hackfruchtacker (Panico-Setarion)

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 2+ Light Value L 3 Salinity Index --
Reaction Value R 3 Temperature factor T 4+
Nutriments value N 4 Continentality K 2
  • 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)

Nomenclature

Accepted Name (Checklist 2017)

Panicum dichotomiflorum Michx.

Vernacular name

Deutscher Name :

Reisfeld-Hirse

Nom français :

Millet des rizières

Nome italiano :

Panico delle risaie

Match with other reference books

Relation Nom Book No
=Panicum dichotomiflorum Michx.Checklist 2017290400
=Panicum dichotomiflorum Michx.Flora Helvetica 20012803
=Panicum dichotomiflorum Michx.Flora Helvetica 20122983
=Panicum dichotomiflorum Michx.Flora Helvetica 20182983
=Panicum dichotomiflorum Michx.Index synonymique 1996290400
=Panicum dichotomiflorum Michx.Landolt 1991160
=Panicum dichotomiflorum Michx.SISF/ISFS 2290400
= 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