BARNES — NORTH AMERICAN MOSSES. 



177 



PHASCUM, p. 41. 



Capsule sub-globose, apiculate. 

 Leaf margins plane or incurved, denticulate 

 Leaf margins reflexed, quite entire. 



Capsule immersed ..... 

 Capsule sub-exserted .... 

 Capsule ovate- or oblong-lanceolate 



PLEURIDIUM, p. 43. 



Inflorescence paroicous. 

 Costa reaching the obscurely serrate apex 

 Costa excurrent into a smooth awl-shaped point 

 Inflorescence autocious. 

 Upper leaves long subulate. 



Entire or apex denticulate or serrulate 

 Serrulate from middle upward . 

 Upper leaves abruptly short pointed . 



P. Carniolicnm, i2. 



P. cnspidatum, 42. 



P. snbexsertum, So. 



P. bryoides, 42. 



P. snbnlatnm, 43, 

 P. Rarenelii, 43. 



P. alternifolium, 44. ^ 



P. Bolanderi, 44. 



P. Sullivantii, 44. 



B. palustris, 45. 



BRUCHIA, p. 45." 

 I. Colluni none 



II. Collum present. 



A. Exceeding the sporangium . . . . B. longicollis, 38. 



B. Shorter than or equaling sporangium. 



I. Capsule exserted. 



Leaves short, not subulate. 



Spores papillose B. Hallii, 47. 



Spores pitted, 



Costa percurrent ..... 

 Costa vanishing below apex 

 Leaves subulate. 



Smooth or sub-papillose. 



Costa filling point ..... 

 Costa not filling point, apex serrulate. 

 Spores spinose. 

 Capsule ovoid, neck short 

 Capsule elongated, neck long 



B, brevifolia, 48. 

 B, fusca, 39. 



B. curviseta, 47. 



B. flexuosa,! 46. 

 B, Sullivantii, 46. 



1 See also Appendix, no. 36. 



2 Bee revision by Eliz. G. Britton, Bull. Torr. Bot, Club 21: 243. 1894. 



