Native Verbena sp? It’s been planted at Ulistac's Native Plant Garden.

At first glance the flower clusters look like Common Lippia, but it’s a taller
plant, and the flowers have five cleft lavender petals with a white center.

I also note that some verbenas have been placed in family Nyctaginaceae.

Possibly a Glandularia sp? or a non-native cultivar? All very confusing.