434 



PTERIDOPHYTES (FERN PLANTS) 



Ferns are propagated vegetativc^y in greenhouses, and out of doors, 

 where conditions are usually unfavorable for the development of 

 their delicate gametophytes, many Ferns propagate almost en- 



FiG. 388. 



A Moonwort {Bolrychium Virginianum). X about k. 



tirely vegetatively. Some propagate by runners, many by the 

 branching and segmenting of the rhizome, some by buds which 

 fall from the leaves to the ground where they develop new plants, 

 and some by the leaves bending over and taking root at their tips. 



