Earthstar

After much research, I've decided that it is either genus Astraeus or Geastrum. It states for both that older samples disintegrate and it is not possible to distinguish what kind of spore sack was in the middle of the star. I hope to find another, fresher sample at some point in the future.

Field guide used to attempt to identify
National Audubon Society Field Guide to North American Mushrooms

Earthstar Scleroderma?
Scleroderma geaster
seems like it might be it
I'm not completely positive, however.

http://procezzed.blogspot.com/2012/02/first-post-on-mushrooms-fungi-so-…