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
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Recent Creeping Thistle Reports in Alberta
Waskasoo Creek (West of 49 Ave)
Red Deer County
County of Wetaskiwin No. 10
Caroline Natural Area
Creeping Thistle Hotspots in Alberta
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