saw-wort (serratula tinctoria). immature capitulum closeup

asteraceae compositae serratula tinctoria anthesis capitulum disc floret flower head imbricate immature inflorescence involucral bract involucre phyllary tubular sawwort dyer 039 plumeless saw-wort tinctoria closeup virtual herbarium belarus flora: focus-stacked closeups wild cultivated plants including flowers leaves fruits intended illustrations botanical manuals