MOSSES WITH A HAND-LENS 



cucullate. The costa does not reach the obtuse and rounded apex. 

 E. CILIATA (Hedw.) Hoffm., the Fringed Extinguisher Moss, 

 is -frequent on rocks in mountain regions. The plants are about 

 one inch in height. The slightly excurrent costa, leaves plane- 

 margined in the upper portion, and the fringed calyptra are its 

 ear marks. The spores mature in summer. 



scopic. 



FAMILY \\. ORTHOTRICHACEAE. The Orthotrichum 



Family* 



JOMEWHAT resembling the Grimmia Family, but nearly 

 always growing on trees. The plants are small, rarely 

 reaching an inch in height and usually much shorter, 

 blackish or brownish green below. The leaves are 

 oblong- or linear-lanceolate and usually very hygro- 

 The calyptra is nearly always hairy and the capsules 

 often immersed, with very distinct longitudinal wrinkles when 



dry and empty. The peristome 

 usually consists oi 16 rather 

 short teeth which are nearly al- 

 ways reflexed when dry and are 

 often united in pairs ; the inner 

 peristome is usually represented 

 by 16 slender hairlike proc- 

 esses, almost too minute for 

 the hand-lens. In the First 

 Edition this family was united 

 with the Grimmiaceae. Mem- 

 bers of these two families may 

 become so dry and brittle as to 

 crumble to dust in the fingers 

 and yet retain their vitality un- 

 impaired, springing into re- 

 newed growth with the next rain. 



DRUMMONDIA, 



Drummondia is a com- 

 FIGURE 28. Drummondia clavellata. mon moss of the Orthotrichum 

 a, x i. b, X 10. c, Calyptra X 10. family. It always grows on the 

 d, Empty capsule X 10. bark of trees, but is easily dis- 



