Genus Geastrum Pers.


The major group of earthstars, Geastrum is a large genus with species sorted into numerous subgenera and sections. Below are the species we have identified for the Chicago Region. There might be some additions with further work because there are other species found in the Upper Midwest, such as in Wisconsin. The second list has names that were used in the Chicago Region and their current status.

  1. Geastrum fimbriatum, (Geastrum sessile).
  2. Geastrum minimum.
  3. Geastrum morganii.
  4. Geastrum pectinatum.
  5. Geastrum rufescens (Geastrum vulgatum, Geaster rufescens).
  6. Geastrum saccatum (Geaster saccatus).
  7. Geastrum schmidelii (Geaster schmidelii).
  8. Geastrum smardae (Geaster limbatus sensu Bresadola).
  9. Geastrum triplex (Geastrum indicum, Geaster triplex).
  • Geaster delicatus (p. 12 in Moffatt 1923) = Geastrum delicatum; unknown status.
  • Geaster hygrometricus = Astraeus hygrometricus group.
  • Geastrum campestre (1979 collection from Will County; det. by P. Ponce de León) unknown status.
  • Geastrum quadrifidum (collection at Morton Arboretum), determined to be Geastrum pectinatum.

Taxon Details and Links

  • Geastrum Pers., Neues Mag. Bot. 1: 85 (1794). Sanctioning citation: Persoon, C.H. Synopsis Methodica Fungorum 1: 131 (1801). Type: Geastrum pectinatum Pers., Syn. meth. fung. (Göttingen) 1: 132 (1801).
  • = Geaster P. Micheli ex Fr., Syst. mycol. (Lundae) 3(1): 8 (1829)
The genus name itself has seven synonyms though the only one that may be familiar is that of Geaster, which was used in older works (e.g., Moffatt 1923) during a time with a different starting date for nomenclature of fungal names.
Anatomy of Geastrum, Dutch translated to English. Menu has species descriptions.
Index Fungorum

Compare Index Fungorum and Mycobank.

Cite this page as: Leacock, P.R. (2015 Aug 21). Geastrum - MycoGuide. Retrieved from

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