canada thistle
Cirsium arvense
39.0058, -84.6319
Field Notes
Description:
Once established, it spreads quickly replacing native plants. It poses an economic threat to the agriculture industry by reducing crops. Flower heads in many clusters at tips of branched stems. Flowerheads are 1/2 to 3/4 inch in diameter and bloom June to October. Flower petals are purple to pink (sometimes white).
Habitat:
Canada thistle is common in pastures and croplands. It invades natural areas such as prairies and dunes that have disturbance. It also invades wet areas with fluctuating water levels such as stream banks, sedge meadows and wet prairies.
Notes:
M
Species ID Suggestions
Spotted for Missions
Photographed
PublishedSeptember 8, 2015
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