A DESERT FASHION SHOW 17 



temperate zone. The important things are : warm sunshine, 

 protection from too low temperatures, the right kind of 

 soil, and limited watering or irrigation. 



LOCATIONS FOR CULTIVATION 



Cacti may be grown out of doors In the entire south- 

 western section of the United States, in Mexico, Central 

 America, and South America (except the southern part), 

 where the temperatures are never colder than fifteen to 

 twTnty-five degrees below freezing. Also, they can be grown 

 successfully out of doors In parts of Spain and Portugal, and 

 In the region Immediately bordering the Mediterranean Sea, 

 over much of Africa lying at the lower altitudes, in Arabia, 

 Persia, India, southern China, extreme southern Japan, and 

 the northern half of Australia, in addition to the Islands of 

 the Pacific, nearly all of which lie between the 33° parallels, 

 north and south (except where the temperatures are modi- 

 fied by mountains or other natural features) . 



They can be grown Indoors generally In the north and 

 south temperate zones between the 34° and 54° parallels, 

 north and south, where the temperatures reach as low as 

 twenty to thirty degrees below zero. This Includes the north- 

 ern two-thirds of the United States, the lower half of the 

 Dominion of Canada, Great Britain, Ireland, France, Ger- 

 many, Austria, the northern half of the Chinese Republic, 

 Japan, and the southern part of South America. 



The Cereus Group or Torch Flower Cacti 



(Cereiis) 



How to identify and how they grow 



Many species of this group can be Identified by the beauti- 

 ful candelabralike branching of the plants. They are trees. 



