372 FOREST TREES OP THE PACIFIC SLOPE. 



bloom from spring throughout the summer; upper central division of each blos- 

 som red-dotted inside (fig. 174). Mature pods (fig. 174), yellowish brown, 

 from 2 to 6 inches long, longitudinally veined, and with 1 to S seeds. Wood 



Fig. 174. — Parkinsonia aculeata: a, seed. 



of the horse-bean is pale brown ; yellowish sapwood thick ; not used for any 

 commercial purpose. 



