These are the very first wildflower I ever learned to recognize. They only bloom for a week or so but their beautiful foliage stays around until fall.
Hint: Think clothing.
Extra points if you can name the common garden plant that is a close relative.
Answer below the fold.
Answer: Dutchman's breeches: dicentra cucullaria
Bleeding heart [dicentra spectabilis] is a close relative of dutchman's breeches.