HYPNACEAE 87 



B. acutum (Mitt.) Sull. "On the ground in swamps near 

 Closter, N. J.," Muse. App. 316; Noroton, Ct., Mrs. J. D. Lowe!!; 

 Valley Stream and Flushing (N. Am. Musci PI. 213), L. Id.!! 

 On rotten wood in swamps; autumn-winter. 



B. campestre B. & S. "On the ground in woods and under 

 shrubbery in yards and gardens, Closter and northern N. J. 

 and southern N. Y.," Muse. App. 314 & 315. Probably fre- 

 quent but scarcely to be distinguished when sterile. Autumn- 

 winter. 



B. cyrtophyllum Kindb. "About roots of trees and on 

 stone fences along dusty highways," Muse. App. 311, as B. 

 acuminatum setosum. Undoubtedly from N. J. 



B. digastrum C. M. & Kindb. I have this from Kingston, 

 N. Y., coll. M. E. Williams, and it undoubtedly occurs near 

 N. Y. City but has not thus far been recognized. 



B. flexicaule R. & C. Jamaica, L. Id.!! A subspecies of 

 B. salebrosum. 



(B. Noveboracense Grout from Valley Stream L. Id. is appar- 

 ently a freak form of B. rutabulum or a hybrid between this and 

 B. rivulare.) 



B. oxycladon (Brid.) J. & S. Damp soil and rocks. Fre- 

 quent. Autumn-winter. 



Var. dentatum (L. & J.) Grout. Bloodroot Valley and 

 Moravian Cemetery, S. Id.!!; Bronx Park, E. G. B.!! 



B. plumosum (Sw.) B. & S. Common on wet ground in 

 swamps and on wet stones in and around streams and swamps. 

 Autumn. 



B. populeum (Hedw.) B. & S. Usually on rocks. Jamaica 

 and Forest Park!!, Flatbush, Brainerd (28248), Brooklyn, Capt. 

 Pike, Bx!, from L. Id.; New Dorp and Princes Bay, S. Id., E. 

 G. B., Bx!; Yonkers, Howe, Bx!; "Same as last," Muse. App. 

 328, that is to say "Common." 



B. rivulare B. & S. Common in brooks and pools and on 

 wet ground and stones. Early autumn. 



