earthstar

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earth·star

 (ûrth′stär′)
n.
Any of various mushrooms of the family Geastraceae, having a round spore case like that of a puffball with an outer covering that splits open in a starlike form.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

earthstar

(ˈɜːθˌstɑː)
n
(Plants) any of various basidiomycetous saprotrophic woodland fungi of the genus Geastrum, whose brown onion-shaped reproductive body splits into a star shape to release the spores
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

earth•star

(ˈɜrθˌstɑr)

n.
a fungus of the genus Geaster, having an outer covering that splits into the form of a star.
[1810–20]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.earthstar - any fungus of the family Geastraceaeearthstar - any fungus of the family Geastraceae; in form suggesting a puffball whose outer peridium splits into the shape of a star
fungus - an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia
family Geastraceae, Geastraceae - a family of earthstar fungi belonging to the order Lycoperdales
Geastrum coronatum - an earthstar with a bluish spore sac and a purplish brown gleba; at maturity the outer layer splits into rays that bend backward and elevate the spore sac
Astreus pteridis - the largest earthstar; the fruiting body can measure 15 cm across when the rays are expanded
Astreus hygrometricus - a common species of earthstar widely distributed in sandy soil; the gleba is a pale tan
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
British Puffballs, Earthstars and Stinkhorns: an account of the British gasteroid fungi.
New sources of taxonomic information for earthstars
British puffballs earthstars and stinkhorns Royal Botanic Gardens KewPyasi A.
I would suggest there's still work to be done to positively identify the "earth-star" in the poem; the daisy is far more likely than the fungus, as the latter closes in hot, dry conditions, not at night like the earthstars do in the second stanza.