I was having a lot of trouble with my Internet connection yesterday and didn't get to post all of the photos I wanted to post. Here are the others. One of the amazing things about this flower is the way it opens. They close overnight, but as soon as the sun touches them, they open right up. It is like watching a time-lapse movie with the whole process taking only a minute or two.
The plant spread and grow from an underground rhizomes, so the flowers appear to grow in colonies here and there.
The reddish sap, from which it got it's name, was used as a dye by native Americans.