Mosses and Lichens 



The Rose Bryum, Bryum roseum, Schreb. See Plate XVIII. 



Habit and habitat. Bryum roseum is one of the largest and 



showiest of the Bryums known outside the tropics. It is found 



in shaded woods at the bases of trees and 

 decayed logs. Under favourable circum- 

 stances this species forms tufts, but usually 

 the plants are scattered among other mosses. 

 Name. The specific name refers to the 

 rose-like arrangement of the crown leaves, 

 Latin roseus, a rose. 



Plant (gametophyte). Fine and large, 



Plant with stolons. Leaves. 



B. roseum. 



stems i to 2 inches long, with few branches; creeping stems 

 (stolons) present, from which new plants arise. 



Leaves. At the apex crowded to form a rosette, each leaf spat- 

 ulate; apex taper-pointed; margin acutely toothed from the middle 

 upward, reflexed to the base, wavy when 

 dry ; vein (costa} broad and reddish at the 

 base, narrowed upward and produced be- 

 yond the apex; cells loose and filled with 

 chlorophyll. Stem-leaves lying close to the 

 stem, oblong-lance-shaped, small and thin. 



Apex of leaf. 



Male flower and bracts. 

 Bryum roseum. 



224 



Male plant. 



