American Yellowwood. This exceptional native species has white wisteria-like flowers in terminal panicles of 8-14" which grace the branches of this native tree in late April. It is at home in sun or shade and will ultimately reach a height of 20-30.' It seems to me that it will begin to flower at a younger age if located in full sun. It was given the prestigious Styer Award in 1994 by the Pennsylvania Horticultural Society. Its roots were boiled to yield a yellow dye in colonial times, hence the common name, and also the old specific name of "lutea.". These are very nice plants up to and over 3 feet tall. The first picture is compliments of www.biolib.cz of the Czech Republic and the second and third pictures are compliments of the University of Minnesota.
Zones 4-8.