Alberta, Canada
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Creeping Thistle
Cirsium arvense
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Also known as - Canada Thistle, Field Thistle.

Not native to Alberta. Perennial. Noxious weed.

General Description

By Gustave J. Yaki

Introduced from France in spite of its common name, Canada Thistle. Abundant. Noxious weed. Stems, creeping underground, forming colonies, erect, smooth, very leafy, 5-10cm high. Leaves, alternate; stalkless, spiny-tipped, pinnately lobed; sometimes hairy below. Flowerheads, many, borne in small clusters from leaf axils; dull purplish lilac or whitish disc florets, less than 2.5cm high; with purplish bracts; June-Sept. Fruit, showy clusters of white pappus, extending above the seeds; individual plants may produce over 40,000 seeds, viable in soil for 20 years. Habitat: fields, roadside, disturbed areas. sWeas.N50.59.413/W114.09.222.

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Where to find Creeping Thistle in Alberta   

There is currently no information regarding this species in our Where & When database.

Interesting Facts about Creeping Thistle   

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Recent Creeping Thistle Reports in Alberta

Abundance Location Reporter Date
Present Waskasoo Creek (West of 49 Ave) Blake 2010/07/22
Present Red Deer County Blake 2010/06/11
Present Maskepetoon Blake 2010/06/06
Present County of Wetaskiwin No. 10 Blake 2009/07/30
Present Caroline Natural Area Blake 2009/07/25

Creeping Thistle Hotspots in Alberta

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