CHAPTER XX 



FAMILY PORTULACACE^: 



IN this family the only plant which may interest 

 the trucker is the purslane. The latter is grown as a 

 pot herb; but it is little known in the United States. 

 It is comparatively free from diseases, only two of 

 which need be mentioned. 



WHITE RUST 

 Caused by Cystopus portulacece (D. C.) Kze. 



In appearance, this rust is not different from the 

 white rust of the radish. However the causative 

 fungus is not the same. White rust is not prevalent 

 in the United States and is of no economic importance. 



ROOT ROT, see RHIZOCTONIA, p. 45. 



Weeds. There are no weeds of importance in the 

 Portulacaceae family which carry diseases detrimental 

 to truck crops. 



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