yellow tansy flowers - tanacetum vulgare, common tansy plant, bitter button, cow bitter, or golden buttons - in green summer

background beautiful beauty biter bitter bloom blooming blossom botany buttons close closeup color common cow culinary environment ethnomedical field flora floral flower garden golden grass green health herb herbaceous insect leaf macro meadow medical medicinal medicine natural nature organic plant pollen repellent summer tanacetum tansy toxicity vulgare wild wildflower yellow