| Name | Cladonia grayi f. simplex C. A. Robbins |
| Authorship | C. A. Robbins |
| Rank | Forma |
| Placed in | Cladonia grayi G. Merrill ex Sandstede |
| Holdings | 64 Specimens held in the Harvard University Herbaria identified as Cladonia grayi f. simplex C. A. Robbins |
| Identification made in | [no date] (64) |
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