262 CHECKLIST OF THE FERN ALLIES. 



Lycopodinm claratnm L. 



LycoiJodiiDii clavatiim f, inonostacliyoii Hook. 



Li/copodium comjManatum L. 



Lycoiyodiuni complaiiatuiii, rJifiDxeci/parinniis (A. Br.) 



Lycopodium chamcecyparissus A. Br. 



Lycopodiuni tristachyon Pursh. 

 Lycopodinm complnuafniii f. flahelliforme Fernald 

 Lijcopfidiiim compldHatimi f. Wibbei Haberer 

 Lycopodinm liicidiiluin Mich.x. 

 Lycopodium lucidiilum porojthylii m (Lloyd & \Jnder\v.) 



Lycopodium porophylutn Lloyd & Underw. 

 Lycopodium, lucidulum f. occidentale Clute 

 Lycopodium iitiitidcittim L. 

 Lycojjodium, in uiulatum f. Sigelovil Tuckerm. 

 Lycopodinm obscurum, L. 



Lycopodium dendroidetnn Michx 

 Lycopodium sabincefolium Willd. 

 Lycopodium selago L. 

 Lycopodium Sitchense Rupr. 



MARSILIA. 



Marsilia quadrifolia L. 

 Mursilia macropotla Engelm. 

 3Iarsilia tiitcuiata A. Br. 

 Marsilia vestita H. & G. 



PILULARIA. 

 Filtdaria Americana A. Br. 



PSILOTUM. 



Psilotum triquefrum Sw. 



Psilotum midiivi (L.) 



SELAGINELLA. 



Sclayhiella opus Spring, 

 Hclufjlnellu areuicola Underw. 

 Selaginella arenaria Underw. 

 Selaginella Higelovii Underw. 



