close up of milk thistle silybum marianum blooming in san francisco bay area, california; native of southern europe through to

america blessed bloom california cardus close closeup color copy detail european flora flower food garden green growth head herb herbal homeopathy macro magenta marian marianum marianus mary medicinal medicine mediterranean milk milkthistle natural nature outdoors plant pricker purple saint scotch sharp silybum single space spiked states thistle thorn united usa variegated violet weed wildflower