MOSSES WITH A HAND-LENS 



173 



FIGURE TOO. 

 nemorosa. Branch 

 Leaf X 10. 



tinctly longer than broad and are 

 strongly ciliate-dentate. The leaves 

 are stiff and only a little larger above. 

 The perianth mouth is ciliate-dentate. 

 The spores mature in spring. 



S. UNDUI/ATA (L.) Dum., the Aquatic 

 Scapania Scapania, is less common than the pre- 

 2t ceding and grows on stones in streams 

 or in very wet places. It is green, or 

 frequently red or dark brownish-red. 

 The leaves are flaccid and distant 

 below, increasing in size and density 

 above. The upper lobe increases pro- 

 portionately in size above and in some 

 cases the lobes become subequal; the 

 margins are never so strongly den- 

 tate as in the preceding, and the lower 

 are frequently nearly entire. The 

 lower lobes are as broad as long or 

 even broader. The spores mature 

 somewhat earlier than in the preceding. 

 The figure of the entire plant is too 

 small ; plants are often found twice as large. 



FIGURE 101. Scapania un- 

 dulata. (After Hooker). 



** LEAVES DIVIDED INTO HAIRLIKE DIVISIONS. 



TRICHOCOLEA. 



T. TOMENTEUvA (Ehrh.) Dum., the 

 Woolly Hepatic, derives its name from 

 the fact that the leaves are divided into 

 very numerous hairlike divisions. It is 

 a large plant somewhat resembling the 

 Fern Mosses in its pinnate branching. 

 It is a beautiful gray-green color, twice 

 or more pinnate, and when held up to 

 the light the fine hairlike structure of 

 the leaves is easily apparent. There 

 is no perianth and the involucral 

 Trichocolea leaves coalesce into a hairy tube at- 



fri f i.- ^o1,rr,t,-o Tli^ crnr^c 

 to the calyptra. 1 he spores 



FIGURE 102. 

 tomentella a little enlarged 



and leaf much enlarged. 



