| Name | Cladostephus verticillatus var. spongiosus (Ag.) Farlow |
| Authorship | (Ag.) Farlow |
| Rank | Variety |
| Placed in | Cladostephus verticillatus (Lightfoot) Lyngbye |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Cladostephus verticillatus var. spongiosus (Ag.) Farlow |
| Identification made in | [no date] (1) |
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