| Name | Calystegia macrostegia subsp. longiloba (Abrams) Brummitt |
| Authorship | (Abrams) Brummitt |
| Rank | Subspecies |
| Placed in | Calystegia macrostegia (Greene) Brummitt |
| Citation | 1965 Ann. Missouri Bot. Gard. 52(2): 215 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Calystegia macrostegia subsp. longiloba (Abrams) Brummitt |
| Identification made in | [no date] (2) |
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