OTHEE AMERICAN PLANTS. 115 



The tender species are evergreen plants, requiring 

 the protection of a cool greenhouse in winter. In 

 summer they should be set out of doors, in a par- 

 tially shaded situation. 



All the species bear pruning well, and may be 

 cut to any required shape. In habit they vary 

 greatly, some naturally being of fine form, and 

 others requiring severe pruning. The foliage is not 

 ornamental, being usually dull or rusty green ; but 

 when in bloom the plants are such a mass of flower 

 that the leaves are not noticed. 



For forcing in the greenhouse, all the species are 

 well adapted ; and there are no better or more easily 

 grown parlor plants than the varieties of tender 

 Azaleas. 



Many hybrids have been produced by fertilization 

 between the Azalea and the Rhododendron. Many 

 of these we have already described : they vary 

 greatly in habit, foliage, and flower, according as 

 they partake of the nature of either parent. The 

 number is very large, and is yearly increasing. 

 The species are : — 



Azalea arborescens. 



A tall shrub, native of the Middle and Southern 

 States, with large, fragrant, rose-colored flowers. 

 The foliage is smooth above, glaucous below, and 

 ornamental. The flowers appear in June, after the 

 leaves. 



We have been unable to find a figure of this 

 species. 



