| Name | Hackelia diffusa var. arida (Piper) R. L. Carr |
| Authorship | (Piper) R. L. Carr |
| Rank | Variety |
| Placed in | Hackelia diffusa (Lehmann) I. M. Johnston |
| Citation | 1976 Mem. New York Bot. Gard. 26(1): 190 |
| Holdings | 46 Specimens held in the Harvard University Herbaria identified as Hackelia diffusa var. arida (Piper) R. L. Carr |
| Identification made in | [no date] (46) |
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