HOW PLANTS OBTAIN WATER. 



25 



48. Frullania. — In fig, 32 is shown another liverwort, which 

 dififers greatly in form from the ones we have 

 just been studying in that there is a well-defined 

 axis with lateral leaf-Uke outgrowths. Such liver- 

 worts are called foliose li\-erworts. Besides these 

 two quite jjrominent rows of leaves there is a 

 third row of poorly de\'eloped leaves on the under 



surface. Also 

 from the 

 unrlcr surface 

 of the a.xis 

 we see here 

 and there 

 slender out- 

 Fig- 34. growths, the 



Under s i d c . ° 

 showing forked r h 1 Z O i d S , 

 under row of 



leaves and lobes t ll r O U g h 

 of lateral leaves. 



which much 



Fig. 32. 



Portion of plant of 

 Frullania, a foliose 

 liverwort. 



Fig. 33. 

 Portion of same 

 more highly magni- 

 fied, showing over- 

 lapping leaves. 



of the water is absorbed. 



49. Absorption by the mosses 



.\mong the mosses, which are 

 usually common in moist and shaded 

 situations, examples are abundant 

 which are suitable for the study of 

 the organs of absorption. If we take 

 for example a plant of mnium 

 (M. afifine), which is illustrated in fig. 

 36, we note that it consists of a slender 



Fig. 35. 

 Foliose liverwort fbazzania) showing dichotomous branching and overlapfting leaves. 



axis with thin fiat, green, leaf-like expans 



Examining w\\}s\ 



