It's poisonous to just about anyone or anything other than pollinators. But still a very popular and widely planted shrub for the reasons given above - very tough, needs minimal maintenance and very drought tolerant.

It is a highly invasive, toxic weed. I spent two summers pulling it out by the trash bag full from the roadside of our property. It pushed out my daisies and brown-eyed susans.

Those common names again .... not to mention Iberis umbellata, an annual, also referred to as Candytuft here. Its an odd combo to my eye since cyclamen are generally used as autumn bedding up until frost whereas the Alyssum blooms all summer long. The cyclamen couldn't take full sun but the Alyssum loves it. Strikes me as a very temporary display, not to mention expensive given the cost of cyclamen, even the miniature cultivars shown here.

Agree with Bill that white mulberry is most likely. At any rate source trees are probably visible somewhere in the vicinity. Otherwise here is how to tell them apart: www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=121220 In short red mulberry has a rough leaf surface and white mulberry does not.