Cirsium arvense
(Canada Thistle)

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Male Inflorescence in Ground


Female Inflorescence in Ground


Male Inflorescence in Ground


Female Inflorescence in Ground


Male Flower Heads in Ground


Female Flower Heads in Ground


Male Flower Heads in Ground


Female Flower Heads in Ground


Male Flower Head in Ground




Lower Quarter of Plant


Second Quarter of Plant


Third Quarter of Plant


Upper Quarter of Plant


Male Inflorescence


Female Inflorescence


Male Flower Head Top


Female Flower Head Top


Male Flower Head Bottom


Female Flower Head Bottom


Male Flower Head Side


Female Flower Head Side


Male Flower Head,
Longitudinal Section


Female Flower Head,
Longitudinal Section


Male Flower


Female Flower


Male Flower Close-Up


Female Flower Close-Up




Female Flower Close-Up