| Name | Johnstonella costata (Brandegee) Hasenstab & M.G. Simpson |
| Authorship | (Brandegee) Hasenstab & M.G. Simpson |
| Rank | Species |
| Placed in | Johnstonella |
| Citation | 2012 Syst. Bot. 37(3): 754 |
| Holdings | 15 Specimens held in the Harvard University Herbaria identified as Johnstonella costata (Brandegee) Hasenstab & M.G. Simpson |
| Identification made in | [no date] (15) |
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