Host:Canada thistle (Cirsium arvense
(L.) Scop.) Descriptor: Sign Description: Young shoots emerge with undersides of leaves and stem covered in pycnia which are later replaced with uredinia and telia Image type: Field Image location: State College, Pennsylvania, United States
Specimen in collection: No Specimen Condition: Identification Method:
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Image Citation:(?) Steven Conaway, Penn State University, Bugwood.org