| Name | Calliergon richardsonii var. pungens Bryhn |
| Authorship | Bryhn |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Calliergon richardsonii (Mitten) Kindberg |
| Citation | 1910 13: no. 638 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Calliergon richardsonii var. pungens Bryhn |
| Identification made in | [no date] (1) |
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