112 BIOLOGICAL SOCIETY OF WASHINGTON. 



3. FISSIDENTE^E. 



Fissidens adiantoides, Hedw. 

 taxifolius, Hedw. 

 minutulus, Sull. 

 osmundoides, Hedw. 



4. LEUCOliRYEJE. 



Leucobryum vulgare, Hampe. 

 minus, Sull. 



5. CERATODONTE.&. 



Ceratodon purpureus, Brid. 



6. POTTIES. 



Pottia truncata, Fuern. 

 Leptotrichum tortile, Muell. 



vaginans, Lesq. & James, 

 pallidum, Hampe. 

 glaucescens, Hampe. 

 Barbula unguiculata, Hedw. 

 " marginata, Br. & Sch. 

 " caespitosa, Schwg. 

 " convoluta, Hedw. 

 " muralis, Timm. 



7. GRIMM IEJE. 



Grimmia apocarpa, Hedw. 



Pennsylvanica, Schwg. 



Olneyi, Sull. 



conferta, Funck. 

 Racomitrium fasciculate, Brid. 

 Hedwigia ciliata, Ehrh. 



8. ORTHOTRICHEvE. 



Ptychomitrium Drummondii, Sull. 



incurvum, Sull. 

 Drummondia clavellata, Hook. 

 Ulota crispa, Brid. 

 " crispula, Brid. 

 " Huthinsiae, Schimp. 

 Orthotrichum canadense, Br. & Sch. 



obtusifolium, Schrad. 

 " exiguum, Sull. 



