348 



STRUCTURE AND LIFE HISTORIES 



noted in Chapter XVI, the thallus of a liverwort, may be 

 chopped fine and every isolated, intact cell will give rise 

 to a new plant. 



Growing plants of the liverwort, Marchantia, isolated 

 by the dying of older tissue develop new individuals; 

 the tips of the leaves of the walking fern may -strike root 



Fig. 255. — Drosera rotundifoUa. Production of a young plant from the 

 leaf of an older plant. (Photo by the author.) 



and originate new plants (Fig. 122), the tips of stolons or 

 runners (as in ferns, eel-grass, strawberries, etc.) may 

 do the same (Figs. 257-259, and 123), isolated sterile 

 branches and "innovation-branches" of Sphagnum moss 

 become new individuals (Fig. 144), as may also the familiar 

 tubers and bulbs (such as those of the potato and onion). 



