| Name | Polysiphonia fruticulosa var. wulfenii Bornet |
| Authorship | Bornet |
| Rank | Variety |
| Placed in | Polysiphonia fruticulosa (Wulfen) Sprengel |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Polysiphonia fruticulosa var. wulfenii Bornet |
| Identification made in | [no date] (1) |