DICRANACEAE 93 



Dicranum fuscescens Turn. (Plate V, Fig. 3) is 

 found on rocks and decaying wood in mountainous 

 regions. The plants are usually well fruited, and ma- 

 ture in the autumn. The stems are about i ^ inches 

 long, often branched, brown below, and matted to- 

 gether with radicles. The leaves are more or less 

 curved and turned to one side, crisped when dry, es- 

 pecially in the upper part. 



Range, Labrador to South Carolina, Alaska to California; 



Europe; Asia. 



D. fuscescens may be distinguished from D. scopa- 

 rium by its smaller size, and narroiver, somewhat shorter, 

 leaves, more crisped when dry. It is also much less fre- 

 quent. If sterile plants are found on rocks they may 

 be confused with D. fulvum (p. 89), but the stems of 

 D. fuscescens are lighter hrown below and thickly covered 

 with radicles, and the leaves are more curled when dry. 



2. Setae clustered 



Dicranum undulatum Ehrh. (Plate V, Fig. 5) is 

 easily recognized by the wavy leaves and clustered setae^ 

 2-5 on one plant. It grows on moist soil and earth- 

 covered rocks in hilly woods. Fruit mature in summer. 



Range, Canada and the northern United States; Eu- 

 rope; Asia. 



The stems of D. undulatum are stout, often 3-4 

 inches long, sometimes prostrate in the lower part, and 



