hairy willowherb hai·ry·wil·lowherb uncommon noun 1. plant of Europe and Asia having purplish-red flowers and hairy stems and leaves; introduced into North America Synonymshairy willowherbcodlins-and-creamEpilobium hirsutum Related words Broader terms willowherb WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
