112 BIOLOGICAL SOCIETY OF WASHINGTON. 



3. FISSIDENTES. 



Fissidens adiantoides, Hedw. 

 " taxifolius, Hedw. 



'• minutulus, Sull. 



osmundoides, Hedw. 



4. LETJCORRYEJi:. 



Leucobryum vulgare, Hampe. 

 " minus, Sull. 



5. CERATODONTEiE. 



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. GKIMMIEjE. 



Grimmia apocarpa, Hedw. 



" Pennsylvanica, Schwg. 



Olneyi, Sull. 



'• conferta, Funck. 



Racomitrium fasciculare, Brid. 

 Hedwigia ciliata, Ehrh. 



8. ORTHOTRICHEiE. 



Ptychomitrium Drummondii, Sull. 



" incurvum, Sull. 



Drummondia clavellata, Honk. 

 Ulota crispa, Brid. 

 " crispula, Brid. 

 " Huthinsise, Schimp. 

 Orthotrichum canadense, Br. & Sch. 

 " obtusifolium, Schrad. 



" exiguum, Sull. 



