BRYACEAE 69 



B. cyclophyllum (Schwaegr.) B. & S. "About roots of trees 

 subject to inundation in a swamp near Closter, N. J.," Muse. 

 App. 192; Bronx Park, E. G. B., Bx! 



Section 2. Pseudotriquetra 



Plants robust (for the genus), with strongly decurrent leaves, 

 which are rather sharply acuminate; costa usually excurrent, 

 and leaf apex or excurrent costa serrate or toothed; peristome 

 thickened and reddish at base. This last character is often 

 obscure. 



B. bimum Schreb. "Wet places, common," Muse. App. 194; 

 "Wet rocks, Palisades, New Jersey," Muse. App. 195; frequent. 

 Summer. 



B. pseudotriquetrum (Hedw.) Schwaegr. "Moist rocks, 

 very common in northern N. J. and southern N. Y.," Muse. 

 App. 200; Palisades of N. J., Austin, Bx! 



Section 3. Caespitibryum 



Plants usually smaller than in the last section; leaves not 

 decurrent, long acuminate, with costa excurrent. Peristome 

 as in the last section. 



B. caespiticium L. The most common of all our species, 

 being found in rather dry soil in all kinds of situations, and on 

 rocks and walls. Spring-summer. 



B. intermedium Brid. Frequent. Spring-summer. 



Section 4 



The peristome in the following species has the characteristics 

 of the two preceding sections. In this section I have put species 

 which did not fit into any of the others. 



B. capillare L. A species likely to be mistaken for a Mnium, 

 as it is Mnium-like in habit and in shape and structure of leaves, 

 but the capsule is typically that of Bryum, with neck one-half 

 as long as the rest of the capsule, or longer. "Shaded banks 

 and rocks, common but sterile in N. J.," Muse. App. 199; 

 Eastchester and Bronx Park, E. G. B., Bx! 



