AQUATIC PLANTS, HARDY FERNS, ETC. 



259 



FERN (Onoclea strutliiopteris), RATTLESNAKE FERN (Bo- 

 tricJiium Virginicum), BLADDER-FERN (Citiopteri* bulbi- 

 fera), and Poly podium vulgar 'e, Woods ia illvensis and 

 oUusa are especially useful for rocks and dry wooded 

 places. 



Ornamental Grasses. 



A number of hardy and very ornamental grasses may play 

 an important part in home lawn decorations, either in 

 masses by themselves or planted with groups of other 

 decorative plants, trees, or shrubs. They are easily grown 



FIG. 152. PAMPAS-GRASS (Gynerium argentum). 



and propagated by division of the clump; one clump of two 

 or three years' growth may often be divided so as to make 

 a score or more plants. The great advantage of these 



