No. II.] THE BRYOPHYTES OF CONNECTICUT. 167 



Acrocladium Mitt. 



Acrccladium cuspidatum (L.) Lindb. Hypnum cuspi- 

 datiim L. 



Swamps, bogs, and wet meadows. Fruit rare, summer. 

 Litchfield: Salisbury, Gilman. Hartford: Berlin, Cole- 

 man. New Haven : East Haven, Eaton; Meriden, Miss Lo- 

 renz; New Haven and Orange (1855), Eaton. 



Canada and the northern United States ; Europe ; Asia ; 

 Africa. 



Ref. Eaton, 15, 68. 



Drepanocladus (C. Miill.) G. Roth 



1. Stem with a cortical layer of large, hyaline cells 2 



Stem lacking a distinct cortical layer 3 



2. Leaves distinctly plicate when moist, and usually minutely 



serrulate; plants monoicous (autoicous) D, aduncus 



Leaves not plicate when moist, entire; plants dioicous.. 



D. intermedius 



3. Leaves serrulate, at least near the apex; annulus lacking; 



plants monoicous (autoicous) D. fluitans 



Leaves entire; annulus distinct; plants dioicous 4 



4. Alar cells enlarged and forming a well-defined group which 



extends from the margin of the leaf to the midrib 



D. Kneiffii 

 Alar cells enlarged, but not extending more than half-way 

 from the margin to the midrib 5 



5. Alar cells hyaline, becoming brown with age, and forming 



a clearly defined group; midrib 0.05-0.06 mm. wide at 



base D. subaduncus 



Alar cells yellowish brown, enlarged, but showing a 

 gradual transition into the normal cells of the leaf; 

 midrib 0.07-0. 11 mm. wide at base D. Sendtneri 



Drepanocladus Kneiffii (Schimp.) Warnst. Hypnum 

 aduncum var. KneiMi Schimp. 



Bogs and swamps, often in the water. Fruit rare, May- 

 June. Litchfield: Salisbury (1907), Nichols. Fairfield: 

 Danbury, Nichols. 



Arctic America, Canada, and the northern United States; 

 Europe; Africa. 



