| Name | Hygroamblystegium irriguum f. marianopolitanum Dupret | 
| Authorship | Dupret | 
| Rank | Forma | 
| Placed in | Hygroamblystegium irriguum (Hooker & Wilson) Loeske | 
| Citation | 1931 Moss Fl. N. Amer. 3: 73. | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hygroamblystegium irriguum f. marianopolitanum Dupret | 
| Identification made in | [no date] (1) | 
