| Name | Cosmarium pyramidatum Brébisson ex Ralfs |
| Authorship | Brébisson ex Ralfs |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium |
| Contains | Cosmarium pyramidatum var. angustatum West & G.S.West Cosmarium pyramidatum var. convexum Willi Krieger & Gerloff Cosmarium pyramidatum f. major Nordstedt Cosmarium pyramidatum var. minus Reinsch Cosmarium pyramidatum f. minus U.C.Pandey & D.C.Pandey Cosmarium pyramidatum var. pseudocucumis G. A. Klebs Cosmarium pyramidatum var. stenonotum (Nordstedt) G. A. Klebs Cosmarium pyramidatum var. stephanii (Irénée-Marie) Willi Krieger & Gerloff Cosmarium pyramidatum var. transitorium (Heimerl) Irénée-Maire |
| Remarks | Created from Taxon Name Import: Cosmarium pyramidatum Brébisson ex Ralfs |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Cosmarium pyramidatum Brébisson ex Ralfs |
| Identification made in | [no date] (5) |
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