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FICHES DE
RENSEIGNEMENTS

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Carthamus lanatus L.

Overview
General Information
ID Info
Similar Species
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Aperçu
Renseignements Généraux
Informations D'identification
Espèces Semblables
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Family :

Famille :

Asteraceae

Synonym(s) :

Synonyme(s) :

Carthamus turbinatus

Common Name(s) :

Nom(s) commun(s) :

Western distaff thistle

Woolly distaff thistle (Carthamus lanatus) achene from inner florets

  • Woolly distaff thistle (Carthamus lanatus) achene from inner florets

  • Woolly distaff thistle (Carthamus lanatus) achene from outer florets; side view

  • Woolly distaff thistle (Carthamus lanatus) achene from outer florets

  • Woolly distaff thistle (Carthamus lanatus) dimorphic achenes

  • Woolly distaff thistle (Carthamus lanatus) dimorphic achenes

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GRIN
CABI

Overview

Aperçu

Regulation :

Remarques Réglementation:

  • Quarantine lists of countries e.g. Mexico *may be updated without notice

Regulation Notes:

On quarantine lists of countries e.g. Mexico*.

*Quarantine lists of countries may be updated without notice.

Distribution :

Répartition :

This species is native to Africa temperate Asia, and Europe. It is naturalized in Australasia and North America (USDA-ARS 2017). In the United States, it occurs in the western states and in South Carolina (USDA-NRCS 2017).

Habitat and Crop Association :

Habitat et Cultures Associées :

Grows in fields, rangelands and roadsides (FNA 2017).

Economic Use, cultivation area, and Weed Association :

Utilisation économique, zone de culture et association de mauvaises herbes :

Duration of Life Cycle :

Durée du cycle vital:

Annual

Dispersal Unit Type :

Type d’unité de dispersion :

Achene

General Information

RENSEIGNEMENTS GÉNÉRAUX

This noxious weed can severely degrade infested rangelands (FNA 2017).

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Flowering Carthamus lanatus (Joseph M. DiTomaso, University of California – Davis, Bugwood.org)

Identification

Identification

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  • Achene

    Size

    • Achene length: 4.0 – 5.1 mm (average: 4.5 mm);  width: 2.3 – 3.5 mm (average 2.7 mm)

    Shape

    • Achene is an angular egg-shape with a flat broad end and a side notch at the narrow end
    • Achene is slightly compressed

    Surface Texture

    • Achene surface wrinkled or scarified, but smooth near the side notch
    • The achene has four long ribs: on the two edges and the two compressed sides; ribs are smooth

    Colour

    • Slightly shiny, whitish to brown- coloured achene
    • Pappus bristles are whitish to light brown coloured

    Other Features

    • A pappus at top of achene may be present, made up of flattened bristles
    • A short style appendage is in the flat area at the broad end of the achene, surrounded by a jagged collar

    Woolly distaff thistle (Carthamus lanatus) dimorphic achenes

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Identification Tips

CONSEILS POUR L’IDENTIFICATION

Additional Botany Information

AUTRES RENSEIGNEMENTS BOTANIQUES

Similar Species

ESPÈCES SEMBLABLES

Similar species are based on a study of seed morphology of various species, and those with similar dispersal units are identified. The study is limited by physical specimen and literature availability at the time of examination, and possibly impacted by the subjectivity of the authors based on their knowledge and experience. Providing similar species information for seed identification is to make users aware of similarities that could possibly result in misidentification.

Carthamus dentatus (toothed thistle)

Carthamus dentatus achenes are a similar angular shape, with a side notch, pale colour, ribbed surface and flattened pappus bristles. Toothed thistle achenes are generally larger (average length: 5.0 mm; average width: 3.8 mm) have a smooth, dull surface, with a brown, wrinkled area around broad end of the achene.

Carthamus tinctorius (safflower)

Carthamus tinctorius achenes are a similar angular shape, with a side notch, pale colour, ribbed surface and flattened pappus bristles.

Carthamus tinctorius achenes are generally larger (average length: 7.7 mm; average width: 4.2 mm), whitish-coloured, and the surface is smooth and glossy with wrinkling only near the broad end. The pappus rarely persists in safflower achenes.

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Reference(s)

Référence(s)

Flora of North America (FNA) Editorial Committee, eds. 1993+. Flora of North America North of Mexico [Online]. 22+ vols. New York and Oxford. http://beta.floranorthamerica.org. Accessed April 25, 2017.

Flora of North America (FNA) Editorial Committee, eds. 1993+. Flora of North America North of Mexico [Online]. 22+ vols. New York and Oxford.  Accessed December 29, 2022.

Global Biodiversity Information Facility (GBIF) Secretariat. 2022. https://doi.org/10.15468/39omei Accessed via https://www.gbif.org/species/3138230 Accessed December 29, 2022.

U.S. Department of Agriculture-Agricultural Research Services (USDA-ARS). 2017. Germplasm Resources Information Network (GRIN), https://npgsweb.ars-grin.gov/gringlobal/taxon/taxonomysearch Accessed April 25, 2017.

U.S. Department of Agriculture-Natural Resources Conservation Service (USDA-NRCS). 2017. The PLANTS Database. National Plant Data Team, Greensboro, NC USA. https://plants.usda.gov/home Accessed April 25, 2017.

Author(s)

AUTEUR(S)

Jennifer Neudorf, Angela Salzl, Ruojing Wang, Karen Castro, Katrina Entwistle

Canadian Food Inspection Agency