78 MISC. PUBLICATION 101, U. S. DEPT. OF AGRICULTURE 
fe 9 
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Fieurn 19.—Screwbean (Strombocarpa odorata). Its peculiar corkscrewlike pods 
are often produced in great abundance and are relished by livestock 
species are native to this country, in the region from Texas to Ari- 
zona, all but one or two of which are shrubby or arborescent. A 
number of the species have considerable forage utility, despite their 
(usually) curved prickly. or spiny stems. They are frequently 
