Notice the double (the base is forked) connivent (the tips touch) fibrils are flat and not round spines. The subgleba is large and the edges of it are raised up partially around the gleba chamber. References used: Miller, O. K., Jr. and H. H. Miller. 1988. Gasteromycetes: Morphological and Developmental Features with Keys to the Orders, Families, and Genera. Mad River Press, Eureka, CA. 157p. Smith, A. H. 1951. Puffballs and Their Allies in Michigan. Univ. of Michigan Press, Ann Arbor, Michigan. 131p. Miller, Orson and Hope Miller. 2006. North American Mushrooms: A Field Guide to Edible and Inedible Fungi. Falcon Guide, Guilford, CT. 583p.