172 



MOSSES WITH A HAND-LENS 



Figure 99- Radula complanata. A. Plant natural size. B. Branch 

 with, fruit showing clearly the seta and capsule, with the calyptra at base 

 of seta showing through the transparent tubular perianth, and at base of 

 the perianth, the involucre. This misrepresents the leaves, making them ap- 

 pear succubous. C. Leaf showing lobule with roothairs and larger lobe 

 with gemmae along the edge. This illustrates the simplest form of a " com- 

 plicate-bilobed " leaf. There are no underleaves. D. Calyptra. E. 

 Spores, highly magnified. 



SCAPANIA. 



The Scapanias are large hepatics with the leaves complicate- 

 bilobed, but the upper lobe the larger, so that there appears to 

 be four rows of leaves instead of two. The lower lobes are suc- 

 cubous while the upper sometimes appear incubous. The mar- 

 gins of the leaves are usually dentate or ciliate-dentate. There 

 are no underleaves. 



S. NEMOROSA (L.) Dum., the Common Scapania, grows 

 on rocks and moist banks. The lower lobes are dis- 



