62 



The Plant World. 



Figure 1. A ditch's broom from a bush of Ephedra trifurca X £. Below is a detail 



of the broom X l£. 



yellow color of the aeeidia and their abundance upon their 

 host gives the dense "brooms" a rather handsome appearance. 

 The whole plant is not affected, but only fascicles of branches 

 here and there. The branches so affected can be noticed as 

 far as the shrub can be seen because the abundance of the fungus 

 gives them a solid appearance quite unlike the ordinary skeleton- 

 like appearance of the plant. One or two other species of 



