| Pycnophyllum aculeatum Muschl. | Pycnophyllum molle J.Rémy |
| Pycnophyllum dicranoides (Kunth) Muschl. | Arenaria dicranoides Kunth |
| Pycnophyllum filiforme Mattf. | Pycnophyllum tetrastichum J.Rémy |
| Pycnophyllum kobalanthum Mattf. | Pycnophyllum tetrastichum J.Rémy |
| Pycnophyllum macrophyllum Muschl. | Pycnophyllopsis macrophylla (Muschl.) Molinari |
| Pycnophyllum peruvianum Muschl. | Arenaria peruviana (Muschl.) Molinari |
| Pycnophyllum weberbaueri Muschl. | Pycnophyllopsis weberbaueri (Muschl.) M.Timaná |