Of course this plant had two blooms open the day AFTER my open garden!
Goblet Flower is an Iris relative and blooms July-September. Each stem blooms multiple times, but each flower only lasts a day. The flowers open in the morning and start to fade before night fall. Cypella coelestis has lovely pale silver-blue flowers with a brown and yellow interior. This one gets about 2' tall and clumps in full sun, in good, well-drained soil. It does appreciate some summer water though.