| Name | Cystoclonium purpurascens f. stellatum Collins |
| Authorship | Collins |
| Rank | Forma |
| Placed in | Cystoclonium purpurascens (Hudson) Kützing |
| Citation | 1903 1140 |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Cystoclonium purpurascens f. stellatum Collins |
| Identification made in | [no date] (7) |
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