These are the lycophytes, ferns and fern allies that are officially listed as rare by the Commonwealth of Massachusetts. The information is taken from the Massachusetts Energy and Environmental Affair's List of Endangered, Threatened and Special Concern Species.
E | Endangered species are native species which are in danger of extinction throughout all or part of their range, or which are in danger of extirpation from Massachusetts, as documented by biological research and inventory. |
T | Threatened species are native species which are likely to become endangered in the forseeable future, or which are declining or rare as determined by biological research and inventory. |
SC | Special concern species are native species which have been documented by biological research or inventory to have suffered a decline that could threaten the species if allowed to continue unchecked, or which occur in such small numbers or with such restricted distribution or specialized habitat requirements that they could easily become threatened within Massachusetts. |
| Species | Common Name | Status |
True Ferns | ||
| Asplenium montanum | mountain spleenwort | E |
| Asplenium ruta-muraria | wall-rue spleenwort | T |
| Cryptogramma stelleri | fragile rock-brake | E |
| Lygodium palmatum | climbing fern | SC |
| Polystichum braunii | Braun's holly fern | E |
| Trichomanes intricatum | Appalachian bristle fern | E |
| Woodsia glabella | smooth Woodsia | E |
Fern Allies | ||
| Equisetum scirpoides | dwarf scouring-rush | SC |
| Ophioglossum pusillum | adder's-tongue | T |
Lycophytes | ||
| Isoetes lacustris | lake quillwort | E |
| Isoetes acadiensis | Acadian quillwort | E |
| Huperzia appressa | Appalachian firmoss | E |
| Huperzia selago | mountain firmoss | E |
| Lycopodiella alopecuroides | foxtail clubmoss | E |