Topic: Circium discolor

  • A whistle for thistle

    By Alyssa Nyberg Although field thistle (Cirsium discolor) is a common “weed” along our Northwest Indiana roadsides, it is a favorite flower of many butterflies, including the Monarch.  From August through October, field thistle provides a valuable nectar source for such butterflies as the fritillaries, swallowtails, painted ladies, and sulfers. The flowers aren’t the only … Continued

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