| 1. | Pods are flat or orbicular, with two or more seeds.
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| 2. | Almost one third of known orbicular rock occurrences are from Finland.
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| 3. | There are dark grey dots in the reniform and orbicular spots.
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| 4. | The orbicular and reniform spots are large and defined by black.
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| 5. | The orbicular and reniform spots are dark, without pale centres.
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| 6. | Inside the capsule, are semi-orbicular, brown seeds.
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| 7. | The orbicular is small but conspicuous and ringed with blackish grey.
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| 8. | The thallus is translucent and sub-orbicular in outline.
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| 9. | There is an orbicular of two brown bars, filled with fulvous.
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| 10. | The orbicular, deeply umbilicated shell has an obtuse-conical shape.
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