description Field Thistle Overview
Field thistle, Cirsium discolor, is a biennial or short-lived perennial thistle native to eastern and central North America. It develops a basal rosette before sending up a branching flowering stem with spiny leaves that are green above and densely white-woolly beneath. Its purple flower heads supply nectar to butterflies and bees, while the mature seeds are eaten by birds such as American goldfinches, which may also use the attached fibers in nesting.
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