| Name | Cladonia didyma f. subulata Sandstede |
| Authorship | Sandstede |
| Rank | Forma |
| Placed in | Cladonia didyma (Fée) Vainio |
| Holdings | 8 Specimens held in the Harvard University Herbaria identified as Cladonia didyma f. subulata Sandstede |
| Identification made in | [no date] (8) |
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