| Common Name | Scientific Name | Code |
| n/a | Huperzia ?bartleyi (Cusick) Kartesz & Gandhi [lucidula ? porophila] | HUBA |
| n/a | Huperzia ?buttersii (Abbe) Kartesz & Gandhi [lucidula ? selago] | HUBU |
| n/a | Huperzia ?carlquistii Beitel & W.H. Wagner [somae ? subintegra] | HUCA6 |
| n/a | Huperzia ?erubescens (Brack.) Holub (pro sp.) [haleakalae ? somae] | HUER2 |
| n/a | Huperzia ?gillettii Beitel & W.H. Wagner [serrata ? subintegra] | HUGI |
| n/a | Huperzia ?koolauensis (W.H. Wagner) Kartesz [nutans ? phyllantha] | HUKO |
| n/a | Huperzia ?medeirosii Beitel & W.H. Wagner [haleakalae ? subintegra] | HUME3 |
| n/a | Lycopodiella ?brucei Cranfill [appressa ? prostrata] | LYBR2 |
| n/a | Lycopodiella ?copelandii (Eig.) Cranfill [alopecuroides ? appressa] | LYCO8 |
| n/a | Lycopodium ?habereri House [digitatum ? tristachyum] | LYHA2 |
| n/a | Lycopodium ?issleri (Rouy) Domin [alpinum ? complanatum] | LYIS |
| n/a | Lycopodium ?zeilleri (Rouy) Greuter & Burdet [complanatum ? tristachyum] | LYZE |
| n/a | Lycopodium phlegmaria L. [excluded] | LYPH4 |
| n/a | Lycopodium venustulum Gaud. var. verticale W.H. Wagner | LYVEV2 |
| n/a | Lycopodium volubile G. Forst. [excluded] | LYVO2 |
| alpine clubmoss | Lycopodium alpinum L. | LYAL3 |
| Antilles clubmoss | Huperzia reflexa (Lam.) Trevisan | HURE |
| Appalachian clubmoss | Huperzia appalachiana Beitel & Mickel | HUAP |
| Chinese clubmoss | Huperzia chinensis (Christ) Czern. | HUCH |
| clubmoss | Huperzia Bernh. | HUPER |
| clubmoss | Lycopodiella Holub | LYCOP6 |
| clubmoss | Lycopodium L. | LYCOP2 |
| daggerleaf clubmoss | Huperzia phyllantha (Hook. & Arn.) Holub | HUPH |
| deeproot clubmoss | Lycopodium tristachyum Pursh | LYTR |
| fan clubmoss | Lycopodium digitatum Dill. ex A. Braun | LYDI3 |
| featherstem clubmoss | Lycopodiella prostrata (Harper) Cranfill | LYPR3 |
| fir clubmoss | Huperzia selago (L.) Bernh. ex Schrank & Mart. | HUSE |
| fir clubmoss | Huperzia selago (L.) Bernh. ex Schrank & Mart. var. densa Trevisan | HUSED |
| fir clubmoss | Huperzia selago (L.) Bernh. ex Schrank & Mart. var. selago (L.) Bernh. ex Mart. & Schrank | HUSES |
| foxtail clubmoss | Lycopodiella alopecuroides (L.) Cranfill | LYAL5 |
| groundcedar | Lycopodium complanatum L. | LYCO3 |
| hairtip clubmoss | Lycopodium venustulum Gaud. | LYVE2 |
| hairtip clubmoss | Lycopodium venustulum Gaud. var. venustulum | LYVEV |
| hanging clubmoss | Huperzia dichotoma (Jacq.) Trevisan | HUDI |
| Huperzia ?bartleyi | Lycopodium ?bartleyi Cusick | LYBA6 |
| Huperzia ?buttersii | Lycopodium ?buttersii Abbe | LYBU |
| Huperzia ?erubescens | Lycopodium erubescens Brack. | LYER |
| Huperzia ?erubescens | Urostachys erubescens (Brack.) Herter ex Nessel | URER |
| Huperzia ?koolauensis | Phlegmariurus ?koolauensis W.H. Wagner | PHKO |
| Huperzia ?sulcinervia | Huperzia ?helleri (Herter) Kartesz & Gandhi | HUHE2 |
| Huperzia ?sulcinervia | Huperzia sulcinervia (Spring) Trevisan [hybrid] | HUSU |
| Huperzia ?sulcinervia | Lycopodium ?helleri Herter | LYHE |
| Huperzia ?sulcinervia | Lycopodium sulcinervium Spring | LYSU |
| Huperzia ?sulcinervia | Urostachys ?helleri (Herter) Herter ex Nessel | URHE |
| Huperzia ?sulcinervia | Urostachys sulcinervius (Spring) Herter ex Nessel | URSU |
| Huperzia acerosa | Huperzia verticillata auct. non (L. f.) Trevisan [misapplied] | HUVE2 |
| Huperzia acerosa | Lycopodium acerosum Sw. | LYAC |
| Huperzia acerosa | Lycopodium portoricense Underwood & Lloyd | LYPO3 |
| Huperzia acerosa | Lycopodium setaceum Lam. | LYSE5 |
| Huperzia acerosa | Lycopodium verticillatum auct. non L. f. [misapplied] | LYVE3 |
| Huperzia acerosa | Urostachys portoricensis (Underwood & Lloyd) Herter | URPO |
| Huperzia acerosa | Urostachys verticillatus auct. non (L. f.) Herter [misapplied] | URVE |
| Huperzia aqualupiana | Lycopodium aqualupianum Spring | LYAQ |
| Huperzia aqualupiana | Urostachys aqualupianus (Spring) Herter | URAQ |
| Huperzia chinensis | Huperzia miyoshiana (Makino) Ching | HUMI |
| Huperzia chinensis | Huperzia selago (L.) Bernh. ex Schrank & Mart. ssp. chinensis (Christ) A.& D. L?ve | HUSEC |
| Huperzia chinensis | Huperzia selago (L.) Bernh. ex Schrank & Mart. var. miyoshiana (Makino) Taylor & MacBryde | HUSEM |
| Huperzia chinensis | Lycopodium chinense Christ | LYCH4 |
| Huperzia chinensis | Lycopodium miyoshianum Makino | LYMI3 |
| Huperzia chinensis | Lycopodium selago L. ssp. chinense (Christ) Hult | LYSEC |
| Huperzia chinensis | Lycopodium selago L. ssp. miyoshianum (Makino) Calder & Taylor | LYSEM2 |
| Huperzia chinensis | Lycopodium selago L. var. miyoshianum (Makino) Makino | LYSEM |
| Huperzia chinensis | Urostachys chinensis (Christ) Herter ex Nessel | URCH4 |
| Huperzia chinensis | Urostachys miyoshiana (Makino) Herter ex Nessel | URMI |
| Huperzia dichotoma | Lycopodium dichotomum Jacq. | LYDI2 |
| Huperzia dichotoma | Phlegmariurus dichotomus (Jacq.) W.H. Wagner | PHDI15 |
| Huperzia dichotoma | Urostachys dichotomus (Jacq.) Herter | URDI2 |
| Huperzia erosa | Huperzia serrata (Thunb. ex Murr.) Trevisan var. dentata (Hbd.) Kartesz & Gandhi | HUSED2 |
| Huperzia erosa | Lycopodium serratum Thunb. ex Murr. var. dentatum Hbd. | LYSED |
| Huperzia filiformis | Lycopodium filiforme Sw. | LYFI |
| Huperzia filiformis | Phlegmariurus filiformis (Sw.) W.H. Wagner | PHFI4 |
| Huperzia funiformis | Lycopodium funiforme Cham. ex Spring | LYFU |
| Huperzia funiformis | Urostachys funiformis (Cham. ex Spring) Herter | URFU |
| Huperzia haleakalae | Lycopodium haleakalae Brack. | LYHA3 |
| Huperzia haleakalae | Urostachys haleakalae (Brack.) Herter | URHA |
| Huperzia linifolia | Lycopodium linifolium L. | LYLI3 |
| Huperzia linifolia | Urostachys linifolius (L.) Herter | URLI |
| Huperzia lucidula | Huperzia lucidula (Michx.) Trevisan var. tryonii (Mohlenbrock) Mohlenbrock | HULUT |
| Huperzia lucidula | Huperzia selago (L.) Bernh. ex Schrank & Mart. ssp. lucidula (Michx.) A.& D. L?ve | HUSEL |
| Huperzia lucidula | Lycopodium lucidulum Michx. | LYLU |
| Huperzia lucidula | Lycopodium lucidulum Michx. var. tryonii Mohlenbrock | LYLUT |
| Huperzia lucidula | Lycopodium reflexum Sw., non Lam. | LYRE |
| Huperzia lucidula | Urostachys lucidulus (Michx.) Herter ex Nessel | URLU2 |
| Huperzia mannii | Lycopodium mannii (Hbd.) Skottsberg | LYMA6 |
| Huperzia mannii | Phlegmariurus mannii (Hbd.) W.H. Wagner | PHMA24 |
| Huperzia nutans | Lycopodium nutans Brack. | LYNU2 |
| Huperzia nutans | Phlegmariurus nutans (Brack.) W.H. Wagner | PHNU4 |
| Huperzia nutans | Urostachys nutans (Brack.) Herter ex Nessel | URNU |
| Huperzia occidentalis | Lycopodium lucidulum Michx. var. occidentale (Clute) L.R. Wilson | LYLUO |
| Huperzia phyllantha | Lycopodium phyllanthum Hook. & Arn. | LYPH3 |
| Huperzia phyllantha | Urostachys phyllanthus (Hook. & Arn.) Herter | URPH |
| Huperzia polytrichoides | Lycopodium polytrichoides Kaulfuss | LYPO2 |
| Huperzia polytrichoides | Urostachys polytrichoides (Kaulfuss) Herter ex Nessel | URPO3 |
| Huperzia porophila | Huperzia selago (L.) Bernh. ex Schrank & Mart. var. patens (Beauv.) Trevisan | HUSEP2 |
| Huperzia porophila | Huperzia selago (L.) Bernh. ex Schrank & Mart. var. porophila (Lloyd & Underwood) A.& D. L?ve | HUSEP |
| Huperzia porophila | Lycopodium lucidulum Michx. var. porophilum (Lloyd & Underwood) Clute | LYLUP |
| Huperzia porophila | Lycopodium porophilum Lloyd & Underwood | LYPO |
| Huperzia porophila | Lycopodium selago L. ssp. patens (Beauv.) Calder & Taylor | LYSEP2 |
| Huperzia porophila | Lycopodium selago L. var. patens (Beauv.) Desv. | LYSEP3 |
| Huperzia porophila | Lycopodium selago L. var. porophilum (Lloyd & Underwood) Clute | LYSEP |
| Huperzia porophila | Urostachys lucidulus (Michx.) Herter ex Nessel var. porophilus (Lloyd & Underwood) Herter ex Nessel, non Lam. | URLUP |
| Huperzia porophila | Urostachys porophilus (Lloyd & Underwood) Herter ex Nessel | URPO2 |
| Huperzia reflexa | Lycopodium reflexum Lam. | LYRE3 |
| Huperzia reflexa | Urostachys reflexus (Lam.) Herter | URRE |
| Huperzia selago var. densa | Huperzia selago (L.) Bernh. ex Schrank & Mart. ssp. arctica (Grossh.) A.& D. L?ve | HUSEA |
| Huperzia selago var. densa | Lycopodium appressum (Desv.) Petrovic, non (Chapman) Lloyd & Underwood | LYAP2 |
| Huperzia selago var. densa | Lycopodium arcticum Grossh. | LYAR3 |
| Huperzia selago var. densa | Lycopodium selago L. ssp. appressum (Desv.) Hult | LYSEA2 |
| Huperzia selago var. densa | Lycopodium selago L. ssp. arcticum (Grossh.) Tolm. | LYSEA3 |
| Huperzia selago var. densa | Lycopodium selago L. var. appressum Desv. | LYSEA |
| Huperzia selago var. selago | Lycopodium selago L. | LYSE |
| Huperzia selago var. selago | Urostachys selago (L.) Herter ex Nessel | URSE5 |
| Huperzia serrata | Huperzia selago (L.) Bernh. ex Schrank & Mart. ssp. serrata (Thunb. ex Murr.) A.& D. L?ve | HUSES3 |
| Huperzia serrata | Huperzia serrata (Thunb. ex Murr.) Trevisan var. serrata (Thunb. ex Murr.) Trevisan [superfluous autonym] | HUSES2 |
| Huperzia serrata | Lycopodium serratum Thunb. ex Murr. | LYSE2 |
| Huperzia serrata | Urostachys serratus (Thunb. ex Murr.) Herter | URSE2 |
| Huperzia sintenisii | Lycopodium sintenisii (Herter) Maxon ex C. Christens. | LYSI2 |
| Huperzia sintenisii | Urostachys sintenisii Herter | URSI2 |
| Huperzia somae | Lycopodium somae Hayata | LYSO4 |
| Huperzia stemmermanniae | Phlegmariurus stemmermanniae A.C. Medeiros & W.H. Wagner | PHST16 |
| Huperzia subintegra | Lycopodium serratum Thunb. ex Murr. var. subintegrum Hbd. | LYSES |
| Huperzia taxifolia | Lycopodium taxifolium Sw. | LYTA |
| Huperzia taxifolia | Phlegmariurus taxifolius (Sw.) A.& D. L?ve | PHTA4 |
| Huperzia taxifolia | Urostachys taxifolius (Sw.) Herter | URTA |
| Huperzia tenuicaulis | Lycopodium tenuicaule Underwood & Lloyd | LYTE3 |
| Huperzia tenuicaulis | Urostachys tenuicaulis (Underwood & Lloyd) Herter | URTE |
| Huperzia wilsonii | Lycopodium wilsonii Underwood & Lloyd | LYWI |
| Huperzia wilsonii | Urostachys wilsonii (Underwood & Lloyd) Herter | URWI |
| inundated clubmoss | Lycopodiella inundata (L.) Holub | LYIN2 |
| Kauai clubmoss | Huperzia subintegra (Hbd.) Beitel & W.H. Wagner | HUSU4 |
| Lycopodiella ?brucei | Lycopodium ?brucei (Cranfill) Lellinger | LYBR3 |
| Lycopodiella ?copelandii | Lycopodium ?copelandii Eig. | LYCO5 |
| Lycopodiella ?copelandii | Lycopodium chapmanii Underwood ex Maxon p.p. | LYCH2 |
| Lycopodiella ?copelandii | Lycopodium inundatum L. var. elongatum Chapman | LYINE2 |
| Lycopodiella ?copelandii | Lycopodium inundatum L. var. robustum R.J. Eat. | LYINR |
| Lycopodiella alopecuroides | Lepidotis alopecuroides (L.) Rothm. | LEAL10 |
| Lycopodiella alopecuroides | Lycopodium alopecuroides L. | LYAL2 |
| Lycopodiella alopecuroides | Lycopodium inundatum L. var. alopecuroides (L.) Tuckerman | LYINA |
| Lycopodiella appressa | Lycopodium adpressum (Chapman) Lloyd & Underwood | LYAD3 |
| Lycopodiella appressa | Lycopodium alopecuroides L. ssp. appressum (Chapman) Clute | LYALA5 |
| Lycopodiella appressa | Lycopodium alopecuroides L. var. appressum Chapman | LYALA6 |
| Lycopodiella appressa | Lycopodium appressum (Chapman) Lloyd & Underwood | LYAP5 |
| Lycopodiella appressa | Lycopodium chapmanii Underwood ex Maxon p.p. | LYCH2 |
| Lycopodiella appressa | Lycopodium inundatum L. var. appressum Chapman | LYINA2 |
| Lycopodiella appressa | Lycopodium inundatum L. var. bigelovii Tuckerman | LYINB2 |
| Lycopodiella caroliniana var. caroliniana | Lycopodium carolinianum L. | LYCA3 |
| Lycopodiella caroliniana var. caroliniana | Pseudolycopodiella caroliniana (L.) Holub | PSCA14 |
| Lycopodiella caroliniana var. meridionalis | Lycopodium carolinianum L. var. meridionale (Underwood & Lloyd) Nessel & Koehne | LYCAM |
| Lycopodiella caroliniana var. meridionalis | Lycopodium meridionale Underwood & Lloyd | LYME |
| Lycopodiella cernua var. cernua | Lepidotis cernua (L.) Beauv. | LECE2 |
| Lycopodiella cernua var. cernua | Lycopodium cernuum L. | LYCE |
| Lycopodiella cernua var. cernua | Palhinhaea cernua (L.) Franco & Vasc. | PACE3 |
| Lycopodiella cernua var. curvata | Lycopodium cernuum L. var. curvatum (Sw.) Grev. & Hook. | LYCEC5 |
| Lycopodiella cernua var. curvata | Lycopodium curvatum Sw. | LYCU |
| Lycopodiella inundata | Lepidotis inundata (L.) C. Borner | LEIN7 |
| Lycopodiella inundata | Lycopodium inundatum L. | LYIN |
| Lycopodiella prostrata | Lycopodium alopecuroides L. var. pinnatum (Chapman) Lloyd & Underwood ex C.A. Brown & Correll | LYALP |
| Lycopodiella prostrata | Lycopodium inundatum L. var. pinnatum Chapman | LYINP |
| Lycopodiella prostrata | Lycopodium prostratum Harper | LYPR2 |
| Lycopodium ?habereri | Diphasiastrum ?habereri (House) Holub | DIHA2 |
| Lycopodium ?habereri | Lycopodium complanatum L. var. habereri (House) Boivin | LYCOH |
| Lycopodium ?habereri | Lycopodium tristachyum Pursh var. habereri (House) Victorin | LYTRH |
| Lycopodium ?habereri | Lycopodium tristachyum Pursh var. laurentianum Victorin | LYTRL |
| Lycopodium ?issleri | Diphasiastrum ?issleri (Rouy) Holub | DIIS3 |
| Lycopodium ?issleri | Diphasium issleri (Rouy) Holub | DIIS4 |
| Lycopodium ?issleri | Lycopodium alpinum L. ssp. issleri (Rouy) Chassagne | LYALI |
| Lycopodium ?issleri | Lycopodium alpinum L. var. decipiens Syme ex Druce | LYALD |
| Lycopodium ?issleri | Lycopodium complanatum L. ssp. issleri (Rouy) Domin | LYCOI |
| Lycopodium ?issleri | Lycopodium complanatum L. var. pseudoalpinum Farw. | LYCOP7 |
| Lycopodium ?zeilleri | Diphasiastrum ?zeilleri (Rouy) Holub | DIZE |
| Lycopodium ?zeilleri | Diphasium zeilleri (Rouy) Damboldt | DIZE2 |
| Lycopodium ?zeilleri | Lycopodium complanatum L. var. elongatum Victorin | LYCOE |
| Lycopodium ?zeilleri | Lycopodium complanatum L. var. gartonis Boivin | LYCOG |
| Lycopodium ?zeilleri | Lycopodium tristachyum Pursh var. boreale Victorin | LYTRB |
| Lycopodium alpinum | Diphasiastrum alpinum (L.) Holub | DIAL5 |
| Lycopodium alpinum | Diphasium alpinum (L.) Rothm. | DIAL6 |
| Lycopodium annotinum | Lycopodium annotinum L. ssp. alpestre (Hartman) A.& D. L?ve | LYANA5 |
| Lycopodium annotinum | Lycopodium annotinum L. ssp. pungens (La Pylaie) Hult | LYANP2 |
| Lycopodium annotinum | Lycopodium annotinum L. var. acrifolium Fern. | LYANA |
| Lycopodium annotinum | Lycopodium annotinum L. var. alpestre Hartman | LYANA2 |
| Lycopodium annotinum | Lycopodium annotinum L. var. pungens (La Pylaie) Desv. | LYANP |
| Lycopodium annotinum | Lycopodium dubium Zoega | LYDU |
| Lycopodium clavatum | Lycopodium clavatum L. var. laurentianum Victorin | LYCLL |
| Lycopodium clavatum | Lycopodium clavatum L. var. subremotum Victorin | LYCLS |
| Lycopodium clavatum | Lycopodium clavatum L. var. tristachyum Hook. | LYCLT |
| Lycopodium complanatum | Diphasiastrum complanatum (L.) Holub | DICO7 |
| Lycopodium complanatum | Diphasium anceps (Wallr.) A.& D. L?ve | DIAN2 |
| Lycopodium complanatum | Diphasium complanatum (L.) Rothm. | DICO10 |
| Lycopodium complanatum | Diphasium complanatum (L.) Rothm. ssp. montellii Kukkonen | DICOM |
| Lycopodium complanatum | Diphasium wallrothii H.P. Fuchs | DIWA |
| Lycopodium complanatum | Lycopodium anceps Wallr. | LYAN4 |
| Lycopodium complanatum | Lycopodium complanatum L. ssp. anceps (Wallr.) Aschers. | LYCOA |
| Lycopodium complanatum | Lycopodium complanatum L. var. canadense Victorin | LYCOC2 |
| Lycopodium dendroideum | Lycopodium obscurum L. var. dendroideum (Michx.) D.C. Eat. | LYOBD |
| Lycopodium dendroideum | Lycopodium obscurum L. var. hybridum Farw. | LYOBH |
| Lycopodium digitatum | Diphasiastrum digitatum (Dill. ex A. Braun) Holub | DIDI8 |
| Lycopodium digitatum | Diphasium complanatum (L.) Rothm. ssp. flabelliforme (Fern.) A.& D. L?ve | DICOF |
| Lycopodium digitatum | Lycopodium complanatum L. var. flabelliforme Fern. | LYCOF |
| Lycopodium digitatum | Lycopodium flabelliforme (Fern.) Blanch. | LYFL5 |
| Lycopodium digitatum | Lycopodium flabelliforme (Fern.) Blanch. var. ambiguum Victorin | LYFLA2 |
| Lycopodium hickeyi | Lycopodium obscurum L. var. isophyllum Hickey | LYOBI |
| Lycopodium lagopus | Lycopodium clavatum L. ssp. megastachyon (Fern. & Bissell) Selin | LYCLM2 |
| Lycopodium lagopus | Lycopodium clavatum L. ssp. monostachyon (Grev. & Hook.) Seland. | LYCLM3 |
| Lycopodium lagopus | Lycopodium clavatum L. var. brevispicatum Peck | LYCLB |
| Lycopodium lagopus | Lycopodium clavatum L. var. integerrimum Spring | LYCLI |
| Lycopodium lagopus | Lycopodium clavatum L. var. megastachyon Fern. & Bissell | LYCLM4 |
| Lycopodium lagopus | Lycopodium clavatum L. var. monostachyon Grev. & Hook. | LYCLM |
| Lycopodium sabinifolium | Diphasiastrum sabinifolium (Willd.) Holub | DISA11 |
| Lycopodium sabinifolium | Lycopodium armatum Desv. | LYAR4 |
| Lycopodium sabinifolium | Lycopodium sabinifolium Willd. var. patens Victorin | LYSAP |
| Lycopodium sabinifolium | Lycopodium sabinifolium Willd. var. sharonense Blake | LYSAS |
| Lycopodium sabinifolium | Lycopodium sabinifolium Willd. var. superfertile Victorin | LYSAS2 |
| Lycopodium sitchense | Diphasiastrum sitchense (Rupr.) Holub | DISI6 |
| Lycopodium sitchense | Diphasium sitchense (Rupr.) A.& D. L?ve | DISI7 |
| Lycopodium sitchense | Lycopodium sabinifolium Willd. ssp. sitchense (Rupr.) Calder & Taylor | LYSAS4 |
| Lycopodium sitchense | Lycopodium sabinifolium Willd. var. sitchense (Rupr.) Fern. | LYSAS3 |
| Lycopodium tristachyum | Diphasiastrum tristachyum (Pursh) Holub | DITR4 |
| Lycopodium tristachyum | Diphasium chamicyparissus (A. Braun) A.& D. L?ve | DICH5 |
| Lycopodium tristachyum | Diphasium complanatum (L.) Rothm. ssp. chamicyparissus (A. Braun) Kukkonen | DICOC2 |
| Lycopodium tristachyum | Diphasium tristachyum (Pursh) Rothm. | DITR5 |
| Lycopodium tristachyum | Lycopodium chamicyparissus A. Braun | LYCH6 |
| Lycopodium tristachyum | Lycopodium complanatum L. ssp. chamicyparissus (A. Braun) Nyman | LYCOC3 |
| Lycopodium tristachyum | Lycopodium complanatum L. var. chamicyparissus (A. Braun) Doell | LYCOC4 |
| Lycopodium tristachyum | Lycopodium complanatum L. var. patentifolium Spring | LYCOP8 |
| Mann's clubmoss | Huperzia mannii (Hbd.) Kartesz & Gandhi | HUMA |
| Marguerite's clubmoss | Lycopodiella margueritiae J.G. Bruce, W.H. Wagner, & Beitel | LYMA7 |
| monarch clubmoss | Huperzia ?sulcinervia (Spring) Trevisan (pro sp.) [serrata ? somae] | HUSU3 |
| narrowleaf clubmoss | Huperzia tenuicaulis (Underwood & Lloyd) B. Pllg. | HUTE |
| needleleaf clubmoss | Huperzia linifolia (L.) Trevisan | HULI |
| nodding clubmoss | Huperzia nutans (Brack.) Rothm. | HUNU |
| northern bog clubmoss | Lycopodiella subappressa J.G. Bruce, W.H. Wagner, & Beitel | LYSU2 |
| one-cone clubmoss | Lycopodium lagopus (Laestad. ex Hartm.) Zinserl. ex Kuzen | LYLA5 |
| Oriental clubmoss | Huperzia somae (Hayata) Ching | HUSO3 |
| Pacific clubmoss | Huperzia haleakalae (Brack.) Holub | HUHA |
| Pennsylvania clubmoss | Lycopodium hickeyi W.H. Wagner, Beitel & Moran | LYHI2 |
| Puerto Rico clubmoss | Huperzia acerosa (Sw.) Holub | HUAC |
| rare clubmoss | Lycopodium obscurum L. | LYOB |
| rock clubmoss | Huperzia porophila (Lloyd & Underwood) Holub | HUPO2 |
| royal clubmoss | Huperzia funiformis (Cham. ex Spring) Trevisan | HUFU2 |
| running clubmoss | Lycopodium clavatum L. | LYCL |
| savinleaf groundpine | Lycopodium sabinifolium Willd. | LYSA |
| shining clubmoss | Huperzia lucidula (Michx.) Trevisan | HULU2 |
| Sintenis's clubmoss | Huperzia sintenisii (Herter) Holub | HUSI |
| Sitka clubmoss | Lycopodium sitchense Rupr. | LYSI |
| slender clubmoss | Lycopodiella caroliniana (L.) Pichi Sermolli | LYCA5 |
| slender clubmoss | Lycopodiella caroliniana (L.) Pichi Sermolli var. caroliniana | LYCAC |
| slender clubmoss | Lycopodiella caroliniana (L.) Pichi Sermolli var. meridionalis (Underwood & Lloyd) B. Pllg. & Windisch | LYCAM2 |
| southern bog clubmoss | Lycopodiella appressa (Chapman) Cranfill | LYAP4 |
| staghorn clubmoss | Lycopodiella cernua (L.) Pichi Sermolli | LYCE2 |
| staghorn clubmoss | Lycopodiella cernua (L.) Pichi Sermolli var. cernua | LYCEC |
| staghorn clubmoss | Lycopodiella cernua (L.) Pichi Sermolli var. curvata (Sw.) Kartesz & Gandhi | LYCEC3 |
| Stemmermann's's clubmoss | Huperzia stemmermanniae (A.C. Medeiros & W.H. Wagner) Kartesz | HUST |
| stiff clubmoss | Lycopodium annotinum L. | LYAN2 |
| stringleaf clubmoss | Huperzia filiformis (Sw.) Holub | HUFI |
| toothed clubmoss | Huperzia erosa Beitel & W.H. Wagner | HUER4 |
| toothed clubmoss | Huperzia serrata (Thunb. ex Murr.) Trevisan | HUSE2 |
| tree groundpine | Lycopodium dendroideum Michx. | LYDE |
| treelimb clubmoss | Huperzia polytrichoides (Kaulfuss) Trevisan | HUPO |
| treetrunk clubmoss | Huperzia aqualupiana (Spring) Rothm. | HUAQ |
| western clubmoss | Huperzia occidentalis (Clute) Kartesz & Gandhi | HUOC |
| Wilson's clubmoss | Huperzia wilsonii (Underwood & Lloyd) B. Pllg. | HUWI |
| yewleaf clubmoss | Huperzia taxifolia (Sw.) Trevisan | HUTA |