Family GRIMMIACEAE 



A FAMILY containing only a few genera, two of which 

 are given below. 



19. GRIMMIA Ehrh. (Grimm -i-a) 



A genus containing a great many species widely dis- 

 tributed, growing only on rocks and stones. The stems 

 branch by forking much more freely than most of the 

 acrocarpous mosses and they are often ascending in- 

 stead of erect, so that, uPxlesG one can find the capsules 

 almost hidden at the tips of the stems and branches, 

 the moss is likely to be mistaken for pleurocarpous. 

 Named after Grimm, a physician and botanist of 

 Gotha, Germany. 



Grimmia apocarpa (L.) Hedw. and G. conferta 

 Funck are the two species most frequently collected, 

 but as they are difficult to distinguish, only general 

 characteristics are given. 



Grimmia apocarpa var. rivularis (Brid.) Web. &: 

 Mohr is found on rocks in and along streams and 

 occurs in our range. The steins are longer than the 

 more common species, reaching from 2-4 inches, 

 freely branched, and leajlcss in the lower part. Other 



