These lovely little orange flowers are Impatiens capensis. Also called "jewelweed" and "quick-in-the-hand," Spotted Touch-Me-Not has seed capsules that, when ripe (in autumn), burst at the merest touch, scattering seeds all around. Also historically used as a remedy for hemorrhoids, among a few other complaints.
Learn to identify one hundred species of flora within walking distance of your home! scsours began this challenge in July of 2008, and I was eager to hop on the bandwagon about a month later. I've remembered much and learned even more. It's been a fun but slow process. Spring has finally arrived here in Massachusetts, and I will hopefully be posting often soon.