Today's photo is a blossom on a Dogwood Tree in Delta Ponds.
Quote from Better Homes and Gardens: "Dogwood (Cornus) -The lovely, butterfly-like blooms of dogwoods herald the beginning of spring, and the show continues into winter with the cheery spectacle of red fruits clinging to bare branches. Dogwoods are versatile trees that do well in full sun and moist soil or shady spots. Most feature fantastic fall color in addition to the attractive blooms." - http://www.bhg.com/gardening/plant-dictionary/tree/dogwood/