84 MISC. PUBLICATION 101, U. S. DEPT. OF AGRICULTURE 
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Ficurp 21.—A, Desert indigobush, locally called Arizona spicebush (Amorpha 
occidentalis), a fragrant shrub that should be carefully watched if cropped by 
livestock; B, ventral surface of leaflet (enlarged) showing dotlike glands 
in as much as several species of Psoralea are reported to be poison- 
ous (95, 118; 81, 1924 ed.). In general, livestock seem seldom to ex- 
hibit any fondness for the herbage of the shrubby peabushes of the 
Western States unless other palatable vegetation is absent or scarce. 
