| Name | Polysiphonia urceolata var. patens (Dillwyn) Harvey |
| Authorship | (Dillwyn) Harvey |
| Rank | Variety |
| Placed in | Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Polysiphonia urceolata var. patens (Dillwyn) Harvey |
| Identification made in | [no date] (3) |
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