Here is a similar flower on the second or third day. This assumes there has been no rain, because rain will knock the petals off a bloodroot flower in bloom.
Little by little, the plant grows taller and taller, and the leaf slowly uncurls and loosens its grip on the stem. At this point, the plant is about 6 inches tall, though that can vary. Look closely at the veins of this leaf. The veins contain an orange colored sap that leaks out if the leaf is broken. The sap resembles blood, which helps explain how the plant got its name.
Here is another view of the leaf wrapped around the stem. This is from a plant that I rescued (road construction) and brought home in a pot before planting it under a tree. I like the way the light shows off the texture of the leaf. The leaf is somewhat fragile and feels rubbery to the touch.
I like the way this shot shows back-lighting if you peak through the opening in the curled leaf.
Here is a closer view of the above shot.
Finally, you can see how the plant got its name, from the "blood" color root. This is one of the plants that I rescued from road construction. I would NOT dig up a plant just to photograph it. I rescued this plant about a year ago, and its former location is now covered by 30 feet of dirt, waiting for an on-ramp to be built on top of it. All of these pictures were taken during the last week of March 2006. I have later shots of bloodroot, showing the full grown leaf and seed pod, but those are not yet ready for posting.