| Name | Spergularia macrotheca var. longistyla R. Rossbach |
| Authorship | R. Rossbach |
| Rank | Variety |
| Placed in | Spergularia macrotheca (Hornemann ex Chamisso & Schlechtendal) Heynhold |
| Citation | 1940 Rhodora 42(495): 78 |
| Holdings | 9 Specimens held in the Harvard University Herbaria identified as Spergularia macrotheca var. longistyla R. Rossbach |
| Identification made in | [no date] (8), 2018 (1) |