156 GARDENING FOR PLEASURE. 



What are known us hothouse or tropical plants re- 

 quire a higher temperature than the preceding, and can- 

 not be well grown unless with a night temperature of 

 from sixty to seventy degrees, and. a day temperature 

 of from ten to fifteen degrees higher. The following, of 

 most of which there are several varieties, can be found 

 described in the catalogues of dealers : 



Allamandas. Ferns, tropical. 



Allocasias. - Heliotropes. 



Begonias. Hibiscus. 



Bouvardias. Impatiens. 



Caladiums. Marantas. 



Cissus. Orchids (of all kinds). 



Clerodendrons. Passifloras. 



Cobaeas. Peperomias. 



Coleus. Poinsettia. 



Crotons. Salvias. 



Dracaenas. Sanchezias. 



Epiphyllums (Cactus). Torenias. 



Eranthemums. Tropaeolums. 



Euphorbias. Tuberoses. 



This matter of temperature has everything to do with 

 the successful cultivation of plants in rooms, or, in fact, 

 anywhere. If you attempt, for example, to grow Bou- 

 vardias or Begonias in an average temperature of forty- 

 five degrees at night, the plants will barely live, and will 

 not flower, nor be healthy. On the other hand, if you 

 subject your Camellias or Geraniums to an average of 

 sixty-five degrees at night by fire heat in winter, you are 

 almost certain to have the flowers drop prematurely. As 

 a rule, there are more of the plants known as greenhouse 

 that will endure the high temperature necessary for the 

 hothouse plants, than there are of the hothouse plants 

 that can stand the low temperature, so that, when no 

 distinction can be made, and a high temperature only 

 can be had, all in the list of greenhouse plants I have 

 marked with a * may be grown fairly well in the high 

 temperature, though they would do better in the low one. 



