Look carefully at the flowers on this plant and you'll see that each flower has five petals but the flower is symmetrical. If you happen to be here when it has seed pods you'll see that they have a graceful curved shape, like the curve of a crane's bill. Both of these are features of a cranesbill geranium.

The Brookside cranesbill geranium flowers prolifically in late spring with masses of small purplish-blue flowers. After the flowers fade the plant bears the distinctive seed capsule. Brookside grows to about 2 feet in height and width in full or partial sun and requires regular deep watering during dry periods.