Geastrum floriforme Vitt. Fruit body 2-2.5cm across when expanded; round spore case with an outer wall consisting of pointed lobes that are bent inward when dry and expanded when wet. Spore sac covered in soil and debris at first, then smooth and pale brownish; indistinct mouth opening. Spore mass brown at maturity. Spores globose, warty, 2.5-3.5 x 2.5-3.5µ. Thick-walled capillitial threads approximately 10µ in diameter. Habitat singly or in small groups on sandy soil. Found widely distributed in North America. Season July-October. Not edible.