Lycopodiophyta (Clubmosses, Firmosses and Quillworts)
Taxonomy
Order: Isoetales
Family: Isoetaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Isoetes amazonica | A. Braun | - | Brazil | Rediscovered | Access | |
Isoetes dixitii | Shende. | ? | Western Ghats, India | Invalid (synonym) | Access | |
| Isoetes gardneriana | Kunze ex A. Braun | - | Brazil | Rediscovered | Access | |
| Isoetes haussknechtii | Troia & Greuter, 2015 | - | Greece | Rediscovered | Access | |
| Isoetes heldreichii | Wettst., 1886 | Pindus quillwort | 1885 | Pindos Mountains, Greece | Missing | Access |
| Isoetes sampathkumarnii | L.N.Rao | ? | Karnataka, India | Invalid (synonym) | Access |
Order: Lycopodiales
Family: Lycopodiaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Lycopodium cunninghamiodes | Baker (Hayata?) | 3 April 1966 | Amami Ōshima, Amami Islands, Satsunan Islands, Ryukyu Archipelago, Japan | Extinct in the wild? | Access | |
| Pseudodiphasium volubile | (G.Forst.) Holub, 1983 | ? | Queensland, Australia | Missing | Access | |
| Urostachys rubrus | (Chaim.) Hert | ? | Minas Gerais state, Brazil | Extinct | Access |
Order: Selaginellales
Family: Selaginellaceae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Selaginella orizabensis | Hieron. | Veracruz, Mexico | Extinct | Access |