serratula tinctoria, dyer's plumeless saw-wort, inflorescences with small purple flowers

biodiversity europe serratula tinctoria asteraceae biology blooming botany bract dye dyer plumeless sawwort ecology florets flower heads green habitat inflorescence meadow mend nature plant plants purple yellow dyer's saw-wort species flowering family source used 19th century growing grasslands mires open woodland scrub inflorescences small flowers