bluemink (ageratum houstonianum). immature capitula closeup

ageratum anthesis asteraceae background belarus black bluemink blueweed botanical botany bract capitulum closeup compositae corymbiform discoid flora floret flossflower flower focus foot glanduar head herbarium houstonianum inflorescence involucral involucre macro mexican nature paintbrush phyllary plants pussy science stacking synflorescence virtual