Cirsium arvense

(L.) Scop. (1771)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Asterids Order: Asterales Family: Asteraceae Genus: Cirsium

Canada thistle, field thistle

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Description

Key Characters:

Growth Form:

Stems:

Roots: Root system includes a tap root, fibrous roots, and adventitious roots.

Leaves: Leaves simple. Alternate. Blades elliptic or oblong Apex acute. Base decurent (extending down the petiole), cuneate (wedge-shaped), or clasping. Margins lobed, pinnatifid, serrate/dentate, or spinose.

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Maui Naturalized

Dispersal Agents


Pollinators

Specimens

Bibliography

Name Published In: Fl. Carniol., ed. 2, 2: 126 (1771)

Other References

Oppenheimer 2019:4 (NEWNAT/EM)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Cirsium arvense E Maui, Makawao District, Alae, Kula FR, Waiakoa Trail Occasional along distrubed trail side and pig diggings. Vegetation: Disturbed Subalpine Shrubland dominated by Pinus spp. With C. vulgare Preserved_Specimen To 1.75m tall, erect, flower purple Oppenheimer, H.L. 61605 Maui BISH 2016-06-13