Canada Thistle

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Cotyledons and first true leaves.  Key characteristics: cotyledons are thick and rounded.  Leaves are covered with hairs.

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Vegetative plant.  Key characteristics: leaf margins have wavy lobes and spines.

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Stem mid-section.

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Upper portion of plant.

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Flower.  Key characteristics: color varies from pink, purple or white.   Flowers are arranged in clusters.


Seed.  Seed are glossy, yellow-brown, elongated with a know on one terminal and have a length of approximately 2.5 to 3.0 mm.

Life cycle: perennial.