| Name | Didymodon rigidulus var. gracilis (Schleicher ex Hooker & Greville) R. H. Zander |
| Authorship | (Schleicher ex Hooker & Greville) R. H. Zander |
| Rank | Variety |
| Placed in | Didymodon rigidulus Hedwig |
| Citation | 1981 Cryptog. Bryol. Lichenol. 2: 393 |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Didymodon rigidulus var. gracilis (Schleicher ex Hooker & Greville) R. H. Zander |
| Identification made in | [no date] (7) |
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