PLANTS FOE WINDOW GARDENING. 117 



POLYPODIDM. 



Those who cannot obtain exotic ferns may cultivate suc- 

 cessfully our pretty, wild polypodium (P. vulgare). It is 



an evergreen species, very common on shaded, rocky 



i^ 

 places, and grows well in the parlor. 



LYGODIUM. 



This is a beautiful genus of climbing ferns, of which one 

 species (L. palmatum) is not uncommon in New England. 



The oldest known species is L. scandens, a native of 

 the East Indies, with large, bright-green foliage, and which, 

 grown upon the rafters of a greenhouse, makes a screen of 

 delicate beauty. It does well in a Wardian case, but is 

 impatient of damp, unless in a high temperature. 



L. japonicum is a charming little climber, and will 

 thrive in a Wardian case, or even in the parlor, if the air 

 is not allowed to get very dry. 



L. palmatum (our "climbing-fern ") is hardy and easily 



cultivated. 



CHRYSANTHEMUMS. 



The recently introduced Japanese chrysanthemums are 

 valuable as prolonging the season of flowers far into the 



