EARTHSTAR
earthstar
(noun) any fungus of the family Geastraceae; in form suggesting a puffball whose outer peridium splits into the shape of a star
Source: WordNet® 3.1
Etymology
Noun
earthstar (plural earthstars)
A type of puffball mushroom, of genus Geastrum, whose surface splits open in a star-shaped form.
Source: Wiktionary
Earth"star`, n. (Bot.)
Definition: A curious fungus of the genus Geaster, in which the outer
coating splits into the shape of a star, and the inner one forms a
ball containing the dustlike spores.
Source: Webster’s Unabridged Dictionary 1913 Edition