| Name | Chamaesiphon incrustans var. elongatus Starmach |
| Authorship | Starmach |
| Rank | Variety |
| Placed in | Chamaesiphon incrustans Grunow |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Chamaesiphon incrustans var. elongatus Starmach |
| Identification made in | [no date] (1) |
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