| Name | Nigredo houstoniata (Schweinitz) Arthur |
| Authorship | (Schweinitz) Arthur |
| Rank | Species |
| Placed in | Nigredo |
| Citation | 1920 N. Amer. Fl. 7(3): 242 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Nigredo houstoniata (Schweinitz) Arthur |
| Identification made in | [no date] (1) |
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