Moss verbena blooms all summer long with purple or pink flowers on spreading plants. The attractive foliage is finely cut, which gives it a ferny look. It makes a nice groundcover.
Verbena tenuisecta is hardy to zone 8, but it can be grown as a self-sowing annual in colder regions. It reseeds in my zone 5 garden. Native to South America. Also known as Verbena pulchella, Fineleaf Verbena, Glandularia pulchella, and South American Mock Vervain.