| Author | Zamora, J.C., Calonge, F.D. & Martín, M.P. |
| Year | 2015 |
| Title | Integrative taxonomy reveals an unexpected diversity in Geastrum section Geastrum (Geastrales, Basidiomycota) |
| Type | Paper |
| Source | Persoonia Vol 34: 130-165. |
| Illustrations | Colour photographs and half-tone SEM micrographs |
| Review (by Malcolm Storey) | Introduces exoperidial crystals as a diagnostic character. Describes seven new species including Geastrum britannicum (fig 9C). Includes keys. |
| Examine |  with a Microscope using 100x oil-immersion ( Scanning Electron Microscope (SEM) is also useful) |
| Identification difficulty | Serious stuff. |
