2l8 



THE PLANT WORLD 



Storage stems, and the other by the yuccas and agaves with 

 thickened leaves and short stems functioning as reservoirs 

 for the water which was accumulated during the latter part 

 of the winter wet season. 



The spinose forms include a wide \'ariety of forms in 

 which the structures resulting from more or less sweeping 



Fis. I. Clump of KcliinooprouR fendleri. 



reduction of branches g'wc them a decided spiny or thorny 

 aspect. 



Among the succulents, the earliest in the vicinity of 

 Tucson is generally Ech'tuocereus feudleri, in which a few 

 brilliant crimson flowers are displayed by the clumps of 

 short , thickened, cylindrical stems late in March, and con- 



