BARTRAMIACEAE 63 



of pools or streams. The stems are densely radiculose below. 

 This genus differs from Bartramia chiefly in the characters 

 mentioned in the key and in the much more slender habit, with 

 a strong tendency to the whorled innovations mentioned above. 

 The plants are nearly always dioicous and the perigonial leaves 

 are made the basis of specific distinctions in this genus to a very 

 unusual extent. 



P. fontana (L.) Brid. "Huntington and Northport, Sanial," 

 Mosses of L. Id.; "Banks of rivulets in springy places, common," 

 Muse. App. 223; Suffern, N. Y., Muse. App. 224. May-June. 



P. Muhlenbergii (Schwaegr.) Brid. "Wet banks, Sussex Co., 

 Rau; Newfoundland. Mrs. Britton," Geol. Surv. N. J. 



BARTRAMIA Hedw. 



Bartramia grows in moist niches in cliffs and on moist shady 

 banks, looking much like tufts of green wool. The capsules 

 are globular and somewhat unsymmetric when moist, but dry 

 with regular folds and alternate ridges. When very dry the 

 body of the capsule becomes so shrunken as to be smaller than 

 the mouth of the capsule itself. The leaves are long and slender 

 and somewhat curled when dry, and strongly papillose. B. 

 Oederi is somewhat of an exception as regards leaf characters, 

 and by recent writers is put in the genus Plagiopus. 



Leaves lanceolate, not papillose Oederi 



Leaves nearly linear, very long and narrow, papillose pomiformis 



B. pomiformis (L.) Hedw. Shaded banks; occasional. (Told 

 Spring, Oyster Bay and Roslyn, L. Id.; Princess Bay, S. Id.; 

 "Bronx Park, Eastchester, High Bridge, Riverdale; "very com- 

 mon," Muse. App. 221; also Palisades and Toms River, N. J. 

 April-May. (Plate VII, Fig. 1.) 



B. Oederi (Gunn.) Sw. Yonkers, Southworth, Bx!;" Banks of 

 ravines Northern N. J.," Muse. App. 222. May-June. 



