CATALOGUE. 341 



MUSCI. 



By Thomas P. James, Cambridge, Mass. 



The Botanists of this Exploration have proved themselves excellent 

 bryological collectors, and have apparently made the collection of mosses 

 a specialty, and have been careful to procure specimens mostly in a fruit- 

 ing condition. Explorers generally ignore these minute objects, or consider 

 them too trifling for their attention. 



This enumeration presents several novelties not heretofore found in 

 this country, and a few of rare species. 



It is deemed advisable to add concise descriptions to the less known 

 species. 



Sphagnum acutifolium, Ehrh. — This specimen has the male organs 

 beautifully developed in the purplish amentaceous branches in the coma 

 and along the stem. 



Hah. — Twin Lakes, in bogs and meadows. 



Sphagnum cuspidatum, var. kecurvum, Beauv. — Distinguished from 

 the above by its flaccid, attenuated branches and spreading leaves, which, 

 when dry, are undulated and slightly crisped. 



Hah. — Twin Lakes, in swamps. 



Gymnostomum rupestre, Schwseg. — This special plant has much resem- 

 blance to, and might be mistaken for, G. curvirostrum, but for the margin of 

 its leaves being plane (not recurved). 



-Ha?*.— Twin Lakes, on damp clay ground. 



Wiesia crispula, Hedw. — Known from W. cirrliata by its more crisped 

 and plane-margined leaves and capsule without an annulus. 



Hah. — Twin Lakes, on rocks in mountainous districts. 



Cynodontium virens, Hedw. 



Hah. — Twin Lakes, on old. logs by mountain streams. 



Cynodontium virens, var. serratum, B. & S. — Distinguished by its 

 strongly serrated leaves and less strumose capsule. 



Hah. — Twin Lakes, on old logs in bogs. 



