| Name | Physacanthus nematosiphon Rendle & Britten |
| Authorship | Rendle & Britten |
| Rank | Species |
| Placed in | Physacanthus |
| Citation | 1909 J. Bot. 47: 378 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Physacanthus nematosiphon Rendle & Britten |
| Identification made in | [no date] (5) |
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