| Firmoss |
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| Scientific classification |
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| Species |
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- Huperzia acerosa
- Huperzia appalachiana - Appalachian firmoss
- Huperzia attenuata
- Huperzia balansae
- Huperzia billardieri
- Huperzia brachiata
- Huperzia bradeorum
- Huperzia brevifolia
- Huperzia campiana
- Huperzia capellae
- Huperzia capillaris
- Huperzia carinata
- Huperzia chamaeleon
- Huperzia compacta
- Huperzia crassa
- Huperzia cumingii
- Huperzia cuneifolia
- Huperzia curvifolia
- Huperzia dacrydioides
- Huperzia dentata
- Huperzia dichaeoides
- Huperzia dichotoma
- Huperzia ericifolia
- Huperzia eversa
- Huperzia filiformis
- Huperzia foliacea
- Huperzia fordii
- Huperzia funiformis
- Huperzia heteroclita
- Huperzia hippuridea
- Huperzia hippuris
- Huperzia hoffmannii
- Huperzia holstii
- Huperzia homocarpa
- Huperzia horizontalis
- Huperzia hystrix
- Huperzia lancifolia
- Huperzia lindenii
- Huperzia linifolia
- Huperzia lockyeri
- Huperzia lucidula - shining firmoss
- Huperzia manii
- Huperzia mesoamericana
- Huperzia mollicoma
- Huperzia myrsinites
- Huperzia nummularifolia
- Huperzia ophioglossoides
- Huperzia pflanzii
- Huperzia phlegmaria
- Huperzia phlegmarioides
- Huperzia pithyodes
- Huperzia pittieri
- Huperzia polycarpos
- Huperzia polydactyla
- Huperzia porophila - rock firmoss
- Huperzia prolifera
- Huperzia reflexa
- Huperzia rosenstockiana
- Huperzia rufescens
- Huperzia sarmentosa
- Huperzia selago - northern firmoss
- Huperzia serratoa
- Huperzia sieboldii
- Huperzia squarrosa
- Huperzia subulata
- Huperzia talamanca
- Huperzia tauri
- Huperzia taxifolia
- Huperzia tenuis
- Huperzia tetragona
- Huperzia tetrasticha
- Huperzia tubulosa
- Huperzia unguiculata
- Huperzia verticillata
- Huperzia wilsonii
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The firmosses are plants of the Lycophyte genus Huperzia. This genus was long lumped in with Lycopodium, but it is now recognized that it is a clearly distinct genus, not closely related to Lycopodium. The plants of this genus generally have radial ranks of entire, linear to lanceolate leaves and dichotomously-branched (forking) vegetative stems, with the spore borne in sporangia on the stem itself. The name "firmoss" was coined to apply to this genus instead of "clubmoss" because of the recognition of the distinctness of this group. "Firmoss" is quite descriptive, since many of the species do resemble fir branches.
