I don't think of them as weeds. I grow all the native nettles. Butterflies need them for host plants. I think they are all quite beautiful. Look up Pilea involucrata and ask yourself if that's a weed.

1. Gymnocalycium mihanovichii (I think, few others may be also Gymnocalyciums...)

second looks like a canna ... a variegated canna .. ken https://duckduckgo.com/?t=ffcm&q=variegated+canna&iax=images&ia=images

Cornus subg. Thelycrania of which this planting would be an example if it consists of a dogwood species does not strictly adhere to opposite leaf arrangement: Cornus in Flora of North America @ efloras.org I'm not sure it makes a huge difference whether Kay 21 thinks the planting is in USDA 5 or 6, with the geographic location of Utah at 6100' probably being the most important combination of involved circumstances.