P4.ANTS OF NORTH ELBA 171 



Hypnum gracile B. df S. 



Thuidium microphyllum (Lindb.) Best 



•Decaying wood and base of trees. Near Tom Peck pond. Not 

 common. Mrs Britton. 



Hypnum scitum Bv. 



Base of trees. Indian pass trail and Newman farm. This may be 

 distinguished from the preceding species by the beaked Hd of the cap- 

 sule and the long filiformly attenuated points of the perichaetial leaves. 



H. scitum aestivale L. 6^ J. 

 Near Lake Placid. Miss Marshall. 



Hypnum delicatulum Z. 



Ground, decaying wood and rocks. Common. Two mosses, 77z?/f(/z?/w 

 recognitum Lindb. and T. Philiberti Limpr., are closely related to this 

 species and are perhaps mere varieties of it. Mrs Britton remarks that 

 none of the characters employed in distinguishing the three species are 

 constant and that her observations of Adirondack specimens of them 

 show great variability not only in the specific distinguishing features, but 

 also in the general appearance of the mosses, this varying according to 

 the character of the places in which they grow. 



BRACHYTHECIUM 



Hypnum laetum Brid. 



Ground, base of trees and leaning or prostrate trunks. Vicinity of 

 Lake Placid. This moss forms showy glossy light green mats and though 

 seldom fruiting it is sure to be collected on account of its shining luxur- 

 iant mats. It frequently grows with Neckera pennata and Bryum rosetwi 

 and has always been found on trees where Zygodon viridissinius was 

 growing. Mrs Britton. 



Hypnum salebrosum Hoffm. 



Ground, decaying wood and stones. Abundant on the ground in wet 

 places. Connery pond trail. Mrs Britton. 



Hypnum velutinum L. 



Ground and rocks. Rocky falls. Mrs Britton. 



