People involved in wildland fire should be skilled at dendrology; here is your chance to brush up on your tree identification. Christoph Niemann put together this great collection of images of, uh, leaves. Here is one sample–then click below to see the rest, which may take a few seconds to load, since it is a large 1.5 Mb file.
Love seeing a little humor on the site. Great for the science geeks out there.