These butterflies can confuse you. Sometimes they are white, sometimes white and yellow, or yellow, or green, or green and yellow . . . but they always are the same size and have the same black dot and black edge on their wings. They are very, very common in the last half of summer. I have even seen them after a killer frost. You can click here to read all about these butterflies on bugguide.net. I wrote a lengthy post about heal all (or healall) in the past and you can click here for all of the information on this valuable wildflower.
I have begun watermarking my photographs on Flickr, which is why you see it here. I hope I never detract too much from the photos.