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Among the Verbena spp. that are native to Illinois, Hoary Vervain is one of the showiest, even though it is sometimes considered an unwelcome weed in pastures. This vervain can be distinguished from similar species by its larger flowers and exceptionally hairy stems and leaves. Naturally occurring hybrids of Hoary Vervain with other Verbena spp. can occur, although they are relatively uncommon.  Return