BAENE8 — NORTH AMERICAN MOSSES. 



217 



b. Leaves pointed, costa percurrent or excurrent. (c) 



i. Capsule short (1:2), abrupt at base. 



Capsule blood-red or dark purple, teeth red at base B. atropurpureum, 232. 

 Capsule pale, teeth pale throughout . . B. microglobum, 307. 



ii. Capsule longer {l:3-\-), tapering at base. 



* Blood red to dark purple. 



Plants short (5-15 mm.) in small lax, yellowish-green tufts. 



Collum half length of sporangium . . B. erythrocarpum, 232. 

 Collum equaling or exceeding the sporangium in 



length B. micro-erythrocarpum, 308. 



Plants larger (3-5 cm.), in large tufts. 

 Tufts shining red or purplish . . . . B. alpinum, 233. 

 Tufts greenish, costa yellow, percurrent or excur- 

 rent B. haematocarpum, 311. 



* * Yellowish-brown. 

 Slightly incurved. 



Constricted below mouth .... 

 Not constricted ..... 



Symmetric. 

 Strongly constricted below mouth. 

 Stems about 1 cm. high 

 Stems 4-10 cm. high .... 

 Slightly constricted below mouth. 



Leaves long decurrent .... 

 Leaves not decurrent or only slightly. 

 Leaf margin plane. 



Pale on the borders .... 

 Red on the borders 

 Leaf margins revolute. 



Margin serrate at the apex 

 Margin quite entire. 

 Cilia single .... 

 Cilia 2-3 .... 



B. meesioides, 336. 

 . B. pallens, 237 



B. turbinatum, 238. 

 B. Schleicheri, 239. 



B. extenuatnm, 323. 



B. Sawyeri, 

 B. erubescens, 324. 



B. pseudotriquetrum,! 238. 



B. acutiusculum, 321. 

 . B. crassirnmeum, 329. 



c. Leaves pointed, costa vanishing. 



[B. extenuatutn and £. crassiranieum may be sought here.] 



Leaves distinctly margined B. capillare,* 235. 



1 See Appendix, nos. 330-332. 



* See Appendix, nos. 317, 318, 344. 



