Scientific Name: Cirsium arvense Form: Oval - vertical
Common Name:Canada thistle Texture:Medium
Family Name:AsteraceaeHabit: Stiffly upright
Plant Type: Invasive plant, Weed (horticultural) Mature Size (ht. X w.):0.7 - 1.3m x 1.0 - 1.5m
Origin: B.C. west of Cascades, B.C. east of Cascades, Canada - central, U.S. - southwest Hardiness Zone:Zone 4: (-34 to -29 C)
Leaves: Simple, Lobed, Alternate, Prickly, Pubescent, Oblong, Pinnately lobed, Pectinate, Spinose
Flowers: Head (capitulum), Violet, Pink, Purple, Jun- Jul- Aug
Fruit: Achene, Brown, Aug- Sep
Exposure: Full sun
Soil or Media: Rocky or gravelly or dry
Landscape Uses: Attract birds, Wildlife food
Key ID Features:Leaves simple and pinnate with spines on margins; stems are spineless; flowers pink to violet, tubular composed of many small, narrow, upright petals.