Leptodactylon pungens ssp. pulchrifolium (or now Linanthus pungens ssp. pulchrifolium, I guess) has proven impressively hardy here! From a grand total of 2 flowers last year, it has outdone itself this year with quite a few more pleasantly-scented, phlox-like blossoms.
If anyone has photos, I'd love to see what more mature, better-grown specimens look like, in the garden or in nature!
Here's the range of the species, from USDA Plants, and the second site shows its range in British Columbia, where it barely sneaks in across the border: