I need help IDing a plant I saw at UNC hospital in the "healing garden" which is at the end of the skybridge from the dogwood parking deck. Anyway it is a perinneal or annual about 18-24" tall, in bloom now with yellow green bract like flowers. At a distance I thought it was Lady's mantle due to the foamy looking flowers. Up close I though the flowers looked like euphorbia, but the leaves did not seem very succulent. There seemed to be a few "babies" nearby, so I think it self sows. Can anyone help me? I do not have any pics.