State-Listed Pteridophytes in New Hampshire

These are the lycophytes, ferns and fern allies that are officially listed as rare by the State of New Hampshire. The information is taken from the New Hampshire Division of Forests and Lands, Natural Heritage Bureau's Rare Plant List for New Hampshire.

Federal (G) and State Codes (S)

G1 S1Critically imperiled because extreme rarity (generally one to five occurrences) or some factor of its biology makes it particularly vulnerable to extinction.
G2 S2Imperiled because rarity (generally six to 20 occurrences) or other factors demonstrably make it very vulnerable to extinction.
G3 S3Either very rare and local throughout its range (generally 21 to 100 occurrences), or found locally (even abundantly at some of its locations) in a restricted range, or vulnerable to extinction because of other factors.
G4 S4Widespread and apparently secure, although the species may be quite rare in parts of its range, especially at the periphery.
G5 S5Demonstrably widespread and secure, although the species may be quite rare in parts of its range, particularly at the periphery.
GU SUStatus uncertain, but possibly in peril. More information needed.
GH SHKnown only from historical records, but may be rediscovered. A G5 SH species is widespread throughout its range (G5), but historical in New Hampshire (SH).
GX SXBelieved to be extinct. May be rediscovered, but evidence indicates that this is less likely than for historical species. A G5 SX species is widespread throughout its range (G5), but extirpated from New Hampshire (SX).
Aglobal rank
Bstate rank
Cfederal listing
Dstate listing
Eknown sites before 1993
Fknown sites 1993 and after
SpeciesCommon NameABCDEF

True Ferns

Asplenium rhizophyllumwalking spleenwortG5S1--E51
Cryptogramma stellerislender rock-brakeG5S1--E33
Diplazium pycnocarponnarrow-leaved glade fernG5S1--E33
Dryopteris filix-mas ssp. brittoniimale wood fernG5T4?S1--E-1
Dryopteris fragransfragrant wood fernG5S2--T510
Lygodium palmatumAmerican climbing fernG4S1--E32
Pellaea atropurpureapurple cliff-brakeG5S1--E-1
Trichomanes intricatumAppalachian bristle fernG4G5SH--E2-
Woodsia glabellasmooth cliff fernG5S1--E22
Woodsia obtusablunt-lobed cliff fernG5S1--E45
Woodwardia areolatanetted chain fernG5S1--E31

Fern Allies

Equisetum palustremarsh horsetailG5S1--E102
Ophioglossum pusillumnorthern adder's-tongue fernG5S1--E13


Isoetes acadiensisAcadian quillwortG3QSH--E3-
Isoetes riparia var. canadensisCanada shore quillwortG5?TNRQS1--E123
Isoetes engelmanniiEngelmann's quillwortG4S1--E141
Isoetes lacustrislake quillwortG5SH--E5-
Lycopodiella appressaappressed bog-clubmossG5S1--E11
Lycopodiella alopecuroides Bogfoxtail clubmoss G5S1-----1
Huperzia appressamountain firmossG4G5S1--E113
Huperzia selagonorthern firmossG5SH--E3-