| Name | Cetraria islandica subsp. crispiformis (Räsänen) Kärnefelt |
| Authorship | (Räsänen) Kärnefelt |
| Rank | Subspecies |
| Placed in | Cetraria islandica (Linnaeus) Acharius |
| Citation | 1979 Michigan Bot. 17(4): 94 |
| Holdings | 25 Specimens held in the Harvard University Herbaria identified as Cetraria islandica subsp. crispiformis (Räsänen) Kärnefelt |
| Identification made in | [no date] (24), 2018 (1) |
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