30 LEGUMINOSiE. Gleditschia. 



87. G-leditschia monosperma, Walt. 

 Water Locust. 



South Carolina, generally near the coast, to Matanzas Inlet and Tampa 

 Bay, Florida, through the Gulf States to the valley of the Brazos River, 

 Texas, and through Arkansas to middle Kentucky and Tennessee, south- 

 ern Indiana and Illinois. 



A tree 12 to 18 metres in height, with a trunk sometimes 0.60 or, 

 exceptionally, 0.90 metre in diameter ; deep swamps ; rare in the south 

 Atlantic and Gulf States ; common and reaching its greatest development 

 on the bottom-lands of southern Arkansas, Louisiana, and eastern Texas, 

 here often covering extensive areas. 



Wood heavy, very hard, strong, rather coarse-grained, compact, suscep- 

 tible of a high polish ; layers of annual growth clearly marked by one to 

 three rows of open ducts; medullary rays thin, conspicuous; color rich 

 bright brown tinged with red, the thick heavier sap-wood clear light 

 yellow. 



88. Parkinsonia Torreyana, Watson. 



Green-barked Acacia. Palo Verde. 



Colorado Desert, southern California to the valley of the lower Gila 

 River, Arizona. 



A low, much-branched tree, 8 to 10 metres in height, the short trunk 

 sometimes 0.45 to 0.50 metre in diameter; low canons ami depressions in 

 the sand-hills of the desert; common and reaching its greatest development 

 in the valleys of the lower Colorado and Gila Rivers. 



Wood heavy, not strong, soft, close-grained, compact, satiny, susceptible 

 of a beautiful polish, containing many small, evenly distributed, open ducts; 

 medullary rays very numerous, thin ; color light brown, the sap-wood clear 

 light yellow. 



89. Parkinsonia microphylla, Ton. 



Valleys of the lower Colorado and Bill Williams Rivers, eastward 

 through southern Arizona. 



A small, much-branched tree, 6 to 7 metres in height, with a trunk 0.25 

 to 0J30 metre in diameter; or often a low shrub, 1 to .':> metres in height. 



Wood heavy, hard, coarse-grained, compact, containing numerous large 

 scattered open ducts j medullary rays numerous, thin, conspicuous ; color 

 dark rich brown streaked with red, the sap-wood light brown or yellow. 



90. Parkinsonia aculeata, L. 



Corpus Christ!, Texas, west along the Mexican boundary to the valley 

 of the Colorado River, Arizona, and southward into Mexico; probably of 

 American origin, but now widely naturalized throughout the tropical and 

 warmer regions of the "lobe. 



