No. II.] THE BRYOPHYTES OF CONNECTICUT. 121 



New Haven: Hamden, Evans; Meriden, Eaton; Milford, 

 Harger; New Haven (1855) and Orange, Eaton; Oxford, 

 Harger; Woodbridge, Nichols. Middlesex : Killingvvorth, 

 Nichols. 



New Brunswick to Nebraska, south to Georgia ; California ; 

 Europe ; Asia ; Africa. 



Ref, Eaton, 15, 63. 



FAMILY MNIACE.E vl 



Mnium (Dill.) L. 



1. Leaf cells not arranged in oblique rows; border of leaves 



several cells thick; marginal teeth in pairs 2 



Leaf cells tending to be arranged in diverging rows, 

 gradually increasing in size from the border toward the 

 midrib 5 



2. Lid strongly convex, mammiform or apiculate; midrib 



toothed at back M. hornum 



Lid rostrate 3 



3. Midrib smooth at back; monoicous (synoicous) 4 



Midrib toothed at back; dioicous M. orthorrhynchum 



4. Perichsetial leaves forming- a rosette, not crispate when 



dry; capsules borne in clusters ." M. spinulosiim 



Perichastial leaves not forming a rosette, crispate when 

 dry; capsules borne singly M. marginatum 



5. Leaves serrate, teeth single, border one cell thick 6 



Leaves entire 11 



6. Monoicous (synoicous) 7 



Dioicous 9 



7. Lid rostrate; stomata scattered over the entire capsule.. 



M. rostratum 

 Lid strongly convex, apiculate; stomata present only on 

 neck of capsule 8 



8. Capsules borne singly; leaves serrate to middle. .M. cuspidatum 

 Capsules borne in clusters; leaves serrate to base. .M. medium 



9. Margin of leaves obscurely toothed M. rugicum 



Marginal teeth of 2-4 cells 10 



10. Marginal teeth robust M. affine 



Marginal teeth slender M. ciliare 



11. Border narrow, scarcely thickened, of one layer of cells. . 



M. cinclidioides 

 Border broad, thickened M. punctatum 



