Heliotropium Species, Seaside Heliotrope

I spotted either this or a very close relative of this plant, growing along the side of a dirt road in Menifee, Ca. this year.
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I doubt it's getting much if any water, but it's still hanging on in this drought.

I read that it --or its close relative-- 'can be invasive', and, 'should be avoided by pet owners' . . . but, no explanations or referrals where I might find out more about those issues, or, much else about it.

I'd like to find out more about it, including how to propagate it.