astreus pteridis: the largest earthstar; the fruiting body can measure 15 cm across when the rays are expanded
earthstar: any fungus of the family Geastraceae; in form suggesting a puffball whose outer peridium splits into the shape of a star
discina macrospora: a discina with a flat or saucer-shaped fertile body that is brown on the upper surface; has a short stalk; not recommended for eating