Finalized sketch for the first panel (20x10 inches). I think I might actually sketch all three out before starting to paint. The central one will take a while as I'm going to make it quite large...20x40 inches. That would make it the largest watercolor I've ever done if I pull it off. Just ordered the illustration board from misterart.com an hour ago, since the largest I usually keep around here is 20x30 inches.
Some thorny inspiration and references from the Berkeley Rose Garden this past weekend: