THE BRYOLOGIST, 



A DEPARTMENT OF THE FERN BULLETIN, 



DEVOTED TO THE STUDY OF NORTH AMERICAN MOSSES. 

 ISSUED QUARTERLY. 



EDITED BV DR. A. J. GROUT. Boy's High School. Brooklyn, N. Y. 

 To whom all correspondence regarding the mosses should be addressed. 



This deparlmeiil h issued separuleiy ill lurnly-live cents a year, hy Ike Fern 

 Bullelin Co., Bin^liamlon, X. Y. >nbscriplioHs should he mailed lo this address. 



Vol. II. October, 1899. No. 4. 



KEY TO THE MNIUMS OF NORTHEASTERN NORTH 



AMERICA. 



1. Lca\es not bordcTcd 2. 



Lea\ OS horrleretl 2_ 



2. Plants large, lca\cs entire or very slighth serrate b\- pro- 



jecting cells; leaf cells twice as long as broad 



M. cinclidioides. 



Plants imicli smaller, leaves usually serrate; leaf cells iso- 

 diametric (/. e., as broad as long) M. stellare. 



3. Leaves entire 4. 



Leaves serrate, with single teeth 7. 



Leaves serrate, with teeth in pairs il. 



4. Leaves costate to apex M. punctatum. 



Costa \anishing below ape.\ ^. 



5. l"pper leaf cells isodiametric .... Af. Iiymenophylloides. 

 Upper leaf cells longer than broad 6. 



6. Margin of leaves thickened, of 2-4 la\ers; dioicous; capsule 



oval. . ........ M. punctatum, \av. elatum. 



^Largin of leaves not thickened; synoicous; capsule round- 

 ish M. psendo punctatum. 



7. Basilar branches stoloniforni; capsules single or clustered. 8. 

 Basilar branches erect or stems simple; capsules clustered. 



M. Drummondii. 



8. Leaves rounded at ape.x, mucronate; operculum restate. 



• • ■ • M. rostratum. 



Leaves acuminate; operculum mamillate or apiculate . . 9. 



9. Leaves serrate to base, teeth usualK- more than one cell in 



length ' 10. 



Leaves serrate to middle, teeth consisting of a single cell. 



M. sylvaticum. 



10. Dioicous; operculum mamillate .... M. cuspidatum. 

 Synoicous; operculum apiculate M. medium. 



