116 



Salicacece. 



Populus alba, L. 



tremuloides, Michx. 

 grandidentata, Michx. 



candicans, Ait. 



nigra, var italica, Du Roi. 



Ceratophyllacece. 



Ceratophyllum demersum, L. 



Bryophytes 



Musci (Mosses.) 

 Sphagnum cymbifolium, Dill. 



compactum, Brid. 



contortum, Schultz. 



cyclophyllum, S. and Lesq. 



acutifolium, Ehrh. 



cuspidatum, Ehrh. 

 Andraea rupestris, Turner. 

 Phascum crassinervium, Sehwffigr. 



muticum, Schreb. 



alternifolium, Brid. 



subulatum, Schreb. 



Sullivantii, Schimp. 



triquetrum, Schimp. 

 Bruchia flexuosa, Schwaegr. 

 Weisia viridula, Brid. 

 Campylostelium saxieola, 



Br. & Sch. 

 Trematodon ambiguus, Brid. 



Dicranum virens, Hedw. , 



var. Wahlenbergii, Br. Eur. 



rufescens, Turner. 



heteroraallum, Hedw. 



montanum, Hedw. 



flagellare, Hedw. 



interruptum, Br. & Sch. 



scoparium, L. 



spurium, var. compactum. 



Hedw. 



undulatum, Turner. 



Drummondii, ]\Iull. 

 Ceratodon purpureus, Brid. 



Leucobryum glaucum, Hampe. 



minus, Hampe. 

 Fissidens minutulus, Sulliv. 



osmundioides, Hedw. 



subbasilaris, Hedw. 



adiantoides, Hedw. 

 Trichostomum tortile, Sclirad. 



vaginans, Sulliv. 



pallidum, Hedw. 



glaucescens, Hedw. 

 Barbula unguiculata, Hedw. 



ca-spitoa, Schwaegr. 



papillosa, Wils. 

 Pottia truneata, Br. & Sch. 

 Tetraphis pellucida, Hedw, 

 Drummondia clavellata, Hook. 

 Orthotrichum obtusifolium, Schrad. 



strangulatum, Beauv. 



canadense, Br. & Sch. 



Ludwigii, Schw^gr. 



Hutchinsiffi, Smith. 



crispulm, Hornsch. 

 Ptychomitrium incurvum, 



Schwaegr. 

 Schistidium apocarpum, Br. & Sch. 

 Grimmia leueopha^a, Grev. 



Olneyi, Sulliv. 



pennsylvanica, SchwEegr. 

 Racomitrium aciculare, Brid. 

 Hedwigia ciliata, Ehrh. 

 Buxbaumia aphylla, Haller. 



