WINTER- FLOWERING PLANTS 69 



temperature when growing, but it should not fall below 

 55"" F. The leaves of these begonias are sometimes infested 

 by a mite, and turn brown in consequence. The insects are 



Fig. 27. — Flowers of Bouvardia, also shoot growing up 

 from the base after the plant has been cut down. 



so small that they can be seen only through a magnifying 

 glass. To destroy them the plant should be sprayed with an 

 insecticide. 



Bouvardia. — There are many fine species and hybrids, 



