Species information

Synthesis

Species description (© Flora Helvetica 2018)

15-80 cm hoch, verzweigt. Stängel kurz behaart, gelblich, unter den Blättern mit 1,5-2,5 cm langen, 3teiligen gelben Stacheln. Blätter 3lappig oder ungeteilt, ganzrandig, unterseits weissfilzig. Blütenköpfe eingeschlechtig, männliche 4-5 mm lang, gelblich, vielblütig, einzeln oder geknäuelt in oberen Blattwinkeln, weibliche 8-15 mm lang in tieferen Blattwinkeln, mit nur 2 kronenlosen Blüten, ihre Hülle wie bei X. strumarium.

Flowering period (© Flora Helvetica 2018)

7-9

Habitat and distribution inside Switzerland (© Flora Helvetica 2018)

Hecken, Schuttplätze / kollin / Vereinzelt VS, VD, SG, SH, AG

World distribution (© Flora Helvetica 2018)

Ursprünglich südamerikanisch

Ecological indicator (© Landolt & al. 2010)

235+44⁺4.t.2n=36

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

Vereinzelt VS, VD, SG, SH, AG

World distribution

Ursprünglich südamerikanisch

Ecology

Life form

Therophyte

Habitats

Habitats © Delarze & al. 2015

	7.1.4 - Einjährige Ruderalflur (Sisymbrion)

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	4	Salinity Index	1
Reaction Value R	3	Temperature factor T	4+
Nutriments value N	5	Continentality K	4

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)

Xanthium spinosum L.

Vernacular name

Deutscher Name :

Dornige Spitzklette

Nom français :

Lampourde épineuse

Nome italiano :

Nappola spinosa

Match with other reference books

Relation	Nom	Book	No
=	Xanthium spinosum L.	Checklist 2017	455100
=	Xanthium spinosum L.	Flora Helvetica 2001	2091
=	Xanthium spinosum L.	Flora Helvetica 2012	2083
=	Xanthium spinosum L.	Flora Helvetica 2018	2083
=	Xanthium spinosum L.	Index synonymique 1996	455100
=	Xanthium spinosum L.	Landolt 1977	3028
=	Xanthium spinosum L.	Landolt 1991	2440
=	Xanthium spinosum L.	SISF/ISFS 2	455100
=	Xanthium spinosum L.	Welten & Sutter 1982	1775

= 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)

Xanthium spinosum L.

1050610