—5 - 



Canada, Macoun fide Kindberg, Pa., Muhlenberg in herb. 

 Hedwig, fide Cardot. On wet rocks in shade along banks 

 of streariis, rarely fruiting. Rockland Co., N. V., and 

 Bergen Co., N. J. Austin. 



4. M. marginatum (Dicks.) P. H. (M. serralum Schrad. M. 



Niagane Kindb.) Crevices of rocks and margins of streams. 

 Can.. N. B., Ont., Minn., Vt., N. Y.. N. J., Pa., O., \a., 

 Mont., Idaho. 



5. M. spinnlosum Br. & Sch. On rocks and banks in woods. 



Can., Que., Ont., C. W., N. H., Vt., N. Y., O.. Mont., I., 

 Wash., B. C, Alaska. {M. spinosum (Voit.) Schw. has not 

 been recorded from the Eastern States except for the ref- 

 erence in the foot-note to M. spinnlosum in L. & J. Man. 

 P- 247). 

 B. — Leaves serrate, teeth single, margins bordered. 



6. M. rostralum Schrad. Wet rocks and banks in woods. Can., 



N. S., Ont., C. W., V. Id., N. E., Conn., N. Y., N. J., Pa., 

 O., Va., Mont., Wyo., Or. 



7. M. cuspidatum (L.) Leyss. (M. sylvaticum, Lindb.) Our 



commonest species. Damp ground in shade. Reported 

 from nearly every State and Territory in U. S. 



8. M. Driimmondii Br. & Sch. On the ground in shady places. 



Can.. N. B., Ont., Mich., Me., N. H., \'t., N. Y. 



9. M. afhne Bland. {M. cuspidatum Neck.) In bogs and wet 



woods; often sterile or forming onlv long showv stolons. 

 N. Y., N. J., Pa., Va., W. \'a. 



\ar. ciliare (Crev.) C. M. (A/, macrociliare Kindb. in 

 part). More common than the species, from which it differs 

 b\ the long cilia-toothed leaves, single capsules on a seta 

 which is red and bent below. Me., N. H., Vt., Mass., Conn., 

 N. Y., N. J., Pa., O., \'a.. W. Va., Ga., La., Mo., Wis., 

 Mont.. Cal., B. C. 



\ar. rugiciim Br. & Sch. Leaves slightly serrate or en- 

 tire. Can., N. H., Mass., Vt., N. Y., N. J., O., Va., Tenn., 

 La. 



10. M. medium, Br. (i Sch. Wet rocks. Little Ealls, N. J., Austin. 



Can., N. 15.. Ont., P. Edw, Id., N. H., Mass., \t., N. Y., 

 N. J., Minn. 



C. — Lea\es entire or simply serrate; not bordered. 



11. M. slellare Reich. Shaded banks, cliffs, rocks and roots of 



trees in swamps; not rare but seldom fruiting. Can., N. B., 

 N. S.. Ont., R. M., N. H., Mass., \t., N. Y., N. J., O. 



12. M. cinclidioides (BIytt.) Huebn. Swamps and wet woods, 



sterile. Palisades of N. J., Austin. Or., Can., Lab., \'. Id., 

 Me., X. H., Mass., N. Y., N. J., Pa. 



D. — Lea\es bordered, entire. 



13. M. puuctatum (L.) Hedw. On rocks and logs in streams, on 



cliffs. Can., Nf., N. S., Miq., Ont., Me., N. H., Conn., 



