Close-up of a purple artichoke thistle flower.

Cardoon (aka artichoke thistle). LA Arboretum, Arcadia, California, USA. #laarboretum #cardoon #artichokethistle #flowers #flowerphotography #nature #focusstacking #naturephotography #amateurphotography #photography #omsystem #om1 #mzuiko300mmf4