| Name | Timmia megapolitana f. cucullata (Michaux) Sayre |
| Authorship | (Michaux) Sayre |
| Rank | Forma |
| Placed in | Timmia megapolitana Hedwig |
| Citation | 1935 Moss Fl. N. Amer. 2: 147 |
| Holdings | 22 Specimens held in the Harvard University Herbaria identified as Timmia megapolitana f. cucullata (Michaux) Sayre |
| Identification made in | [no date] (22) |
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