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Panicum dichotomiflorum Michx.

Panicum dichotomiflorum Michx.

Species
SIFS: 290400
Checklist: 1032370

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 (© Flora Helvetica 2018)

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

Anatomy

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 (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)

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

World distribution (© Flora Helvetica 2018)

Stammt aus Nordamerika

Ecology

Life form

Therophyte

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 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

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)

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

Relationship Scientific name Book No
=Panicum dichotomiflorum Michx.Checklist 2017290400
=Panicum dichotomiflorum Michx.Flora alpina 2004139.71.4
=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

Crop Wild Relatives

CWR specie