I wouldn't, its there for all of us to enjoy. If everyone picked it there would be none left. Most nurseries carry them. Its easy to grow and is available in seeds or a plant
Picking wildflowers is illegal in California but I've seen people do it (while hiking). I don't think amyone would say anything if you're not greedy. Eucalyptis is rampant in San Diego, you can get that anywhere.
I would guess do
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