Lycopodiophyta (Clubmosses, Firmosses and Quillworts)
Order: Isoetales
Family: Isoetaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Isoetes amazonica | A.Braun (1880) | - | (rediscovered) | Brazil | Rediscovered | Access |
| Isoetes bradei | Herter (1949) | - | October 1921 or later | Brazil | Missing or extinct | Access |
|
Isoetes dixitii
|
Shende. (1945) | - | (rediscovered) | Western Ghats, India | Rediscovered? | Access |
| Isoetes gardneriana | Kunze ex A.Braun (1862) | - | (rediscovered) | Brazil | Rediscovered | Access |
| Isoetes haussknechtii | Troìa & Greuter (2015) | Greek quillwort | (rediscovered) | Greece | Rediscovered | Access |
| Isoetes heldreichii | Wettst. (1886) | Pindus quillwort | July 1885 | Pindos Mountains, Greece | Missing or Extinct | Access |
|
Isoetes louisianensis |
Thieret (1973) | Louisiana quillwort | (rediscovered) | Louisiana & Mississippi, USA | Rediscovered | Access |
| Isoetes philippinensis | Merr. & L.M. Perry (1940) | - | (rediscovered) | Philippines | Rediscovered | Access |
| Isoetes sampathkumarnii | L.N.Rao (1944) | - | ? | Karnataka, India | Extinct or invalid (synonym) | Access |
| Isoetes sinensis | Palmer (1927) | Narrow quillwort | ? | China | Erroneously listed as possibly extinct | Access |
Order: Lycopodiales
Family: Lycopodiaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Huperzia rubra | (Cham. & Schltdl.) Trevis. (1875 "1874") | (rediscovered) | Minas Gerais state, Brazil | Rediscovered | Access |
Order: Selaginellales
Family: Selaginellaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Selaginella orizabensis | Hieron. (1902) | 1855 | Veracruz, Mexico | Extinct | Access | |
|
Selaginella serratosquarrosa |
Quansah (1989) | - | 1948 | Cameroon | Missing | Access |