That would be the iris, and this photo is of the Carol Ann Moyer Iris Garden, now in full bloom at Delaware Valley College in Doylestown. (Photo by Mary Boyle, of DelVal)
Moyer is a retired science teacher, master gardener and iris champion. She designed and planted this circular, 80-foot-diameter garden (with help from her husband and son) back in 2007 to hold 11,000 irises. It's beautiful today.
Often called "flags" or "friendship flowers," irises are blooming all over the region. My favorites are the fragrant bearded varieties. Their scent wafts over the fence from my garden, stopping passersby.
The friendship comes in every fall, when it's time to divide and share the rhizomes. It's easily done and very satisfying, to bring bags of lumpy rhizomes topped by sword-shaped foliage into the office to give away.