|Scientific name:||Cirsium arvense (L.) Scop.|
|Synonym name:||, Serratula arvensis L.|
|English name:||Creeping Thistle, Canada thistle|
|Plant Family:||Compositae / Asteraceae, Korgblommiga växter, Sunflower family|
|Life form:||Perennial plants having creeping, deep roots|
|Stems:||Height: 40–120 cm, erect, branched, furrowed, spineless, unwinged and more often with glabrous or cobwebby pubescence under calathidia (capitula)|
|Leaves:||Alternate, oblong to lanceolate, lobed, up to 15–20 cm long and 2–3 cm broad, very spiny|
|Flowers:||Plants are male or female (dioecious), numerous, small, unisexual, pale lilac-flowered heads, 1-5/branch, 15-25mm high, male heads globular, slightly smaller than the flask-shaped female heads; involucral bracts subtending the heads (florets) are not spine-tipped, often purplish|
|Flowering Period:||July, August, September|
|Fruits:||Cypsela, yellowish-brown, flattened, smooth, 3–4 mm long, crowned by a pappus of branched, feathery, 2–3 cm long hairs|
|Habitat:||Throughout the country, fields, meadows, pasture|
Derivation of the botanical name:
Cirsium, from the Greek word kirsos, "swollen vein". Thistles were used as a remedy against swollen veins.
arvense, arvum (field) and refers to the species commonly grows in fields.