Bui. 728, U. S. Dept. of Agriculture. 



Plate IV. 



Fig. 1.— Old Soap Weed (Yucca elata) near the Arizona Line, Northwest of 



lordsburg, n. mex. 



These plants are 12 to 15 feet high exclusive of the flower stalks. They are at least 50 years old. 

 Compare this figure with figure 2 of this plate. 



Fig. 2.— Mature Bear-Grass (Yucca glauca) near Elida, N. Mex. 



This figure and figure 1 bring out the similarities and differences between these two nearly related 

 species so far as they can be seen in plants that are not in bloom. 



