Acacia. LEGUMINOS.E. 33 



96. Leucaena pulverulenta, Benth. 



Southern Texas, — valley of the lower Rio Grande ; in northern 

 Mexico. 



A small tree, 6 to 8 metres in height, with a trunk 0.10 to 0.15 metre 

 in diameter, often forming dense thickets ; rich, sandy loam. 



Wood heavy, hard, very close-grained, compact, containing many small, 

 regularly distributed, open ducts ; medullary rays very numerous, thin, 

 conspicuous ; color rich dark brown, the sap-wood clear yellow. 



97. Acacia "Wrightii, Benth. 

 Cat's Claw. 



Valley of the Guadalupe River, western Texas, west and south to the 

 valley of the Rio Grande ; in northern Mexico. 



A small tree, rarely 9 metres in height, with a trunk sometimes ex- 

 ceeding 0.30 metre in diameter, or often a low, much-branched shrub. 



Wood very heavy, hard, very close-grained, compact ; layers of annual 

 growth marked by one or two rows of small open ducts, and containing 

 many scattered smaller ducts; medullary rays hardly distinguishable; 

 color bright clear brown streaked with red and yellow, the sap-wood 

 clear yellow. 



98. Acacia G-reggii, Gray. 

 Cat's Claw. 



Valley of the Rio Grande in western Texas, west through south- 

 ern New Mexico and Arizona to San Diego, California; in northern 

 Mexico. 



A low, much-branched tree, sometimes 9 metres in height, with a 

 trunk rarely 0.45 metre in diameter, or often a shrub ; dry slopes and low 

 canons ; common, the large specimens generally hollow and defective. 



Wood heavy, exceedingly hard, strong, brittle, close-grained, compact ; 

 layers of annual growth marked by numerous rows of rather large open 

 ducts ; medullary rays numerous, thin ; color rich brown or red, the sap- 

 wood light yellow. 



A resinous gum resembling gum-arabic is yielded by this species. 



99. Acacia Berlandieri, Benth. 



Valley of the Nueces to Devil's River, southern Texas, southward 

 into Mexico. 



A small tree, sometimes 6 to 8 metres in height, with a trunk 0.15 to 

 0.20 metre in diameter ; or more often a tall shrub, sending up many stems 

 from the ground. 



Wood not examined. 



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