This is Baptisia bracteata, also known as False Indigo, Longbract Wild Indigo, Plains Wild Indigo, and Cream Wild Indigo. When the Queen Bumblebee comes out of hibernation in late Spring she feeds on Baptisia bracteata. That is why this plant is so important to the bumblebee population. False Indigo has been known to live for decades, so over 20 years. Growing to about 2 feet high, this plant likes to live in the sun or partial shade. It blooms from late Spring until the middle of the Summer. This is also a larval host plant for the Wild Indigo Duskywing, and Hoary Edge butterflies. USDA Hardiness Zones 3 to 9.