60 FOREST TEEES OF NORTH AMERICA. 



WATER LOCUST. 



South Carolina to Matanzas inlet and Tampa bay, Florida, through the Gulf states to the valley of the Brazo* 

 river, Texas, 'and through Arkansas to middle Kentucky and Tennessee, southern Indiana and Illinois. 



A tree 12 to 18 meters in height, with a trunk sometimes 0.60 or, exceptionally, 0.90 meter in diameter; deep 

 swamps ; rare in the south Atlantic and Gulf states ; common and reaching its greatest development in the bottom 

 lands of southern Arkansas, Louisiana, and eastern Texas, here often covering extensive areas. 



Wood heavy, very hard, strong, rather coarse-grained, compact, susceptible 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; specific gravity, 0.7342; ash, 0.73. 



88. Parkinsonia Torfeyana, Watson, 

 Proc. Am. Acad. xi, 135. Brewer & Watson, Bot. California, i, 162. 



Cerddium floridum, Torrey in Pacific E. E. Eep. iv, 11, 82; v, 360, t. 3; Bot. Mex. Boundary Survey, 59. Gray in Ire** 

 Rep. 11. Vasey, Cat. Forest Trees, 12. James in Am. Nat. xv, 982. Hemsley, Bot. Am.-Cent. i, 327. 





 GREEN-BARK ACACIA. PALO VERDE. 



Colorado desert, southern California (Inio, Toras, etc., Parish Brothers), east to the valley of the lower Gila 

 river, Arizona. 



A low, much-branched tree, 8 to 10 meters in height, the short trunk sometimes 0.45 to 0.50 meter in diameter; 

 low carious and depressions in the sandhills 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 ; specific gravity, 0.6531 ; ash, 1.12. 



89. Parkinsonia microphylla, Torrey, 



Pacific R. E. Eep. iv, 82; Bot. Mex. Boundary Survey, 59. Walpers, Ann. vii, 812. Gray in Ives' Eep. 11. Bentham in Martius, Fl. 

 Brasil. xv 2 , 78. Watson, PI. Wheeler, 8; Proc. Am. Acad. xi, 136. Brewer & Watson, Bot. California, i, 162. ifemsley, Bot. Am.- 

 Cent. i, 327. 



Valley of the lower Colorado and Bill Williams rivers, eastward through southern Arizona. 



A small, much-branched tree, 6 to 7 meters in height, with a trunk 0.25 to 0.30 meter in diameter (Wickenburg, 

 Pringle), or often a low shrub 1 to 3 meters in height. 



Wood heavy, hard, coarse-grained, compact, containing numerous large, scattered, open ducts; medullary 

 rays numerous, thin, conspicuous; color, rich dark brown streaked with red, the sap-wood light brown or yellow; 

 specific gravity, 0.7449; ash, 3.64. 



90. Parkinsonia aculeata, Linnaeus, 



Spec. 1 ed. 375. Jacquin, Stirp. Am. 121, t. 80. Lamarck, 111. ii, 475, t. 336. Willdenow, Spec, ii, 513. Alton, Hort. Kew. 2 ed. iii, 

 24. De Candolle, Mem. Leg. ii, t. 21; Prodr. ii, 486. Descourtilz, Fl. Med. Antilles, i, 54, t. 12. Macfadyen, Fl. Jamaica, 

 334. Bentham, Bot. Sulphur, 87; Martius, Fl. Brasil. xv 2 , 78, t. 26. Cooper in Smithsonian Eep. 1858, 265. Torrey, Bot. Mex. 

 Boundary Survey, 59. Grisebach, Fl. British West Indies, 204 ; PI. Loreutz. 81. Gray, Hall's PI. Texas, 8. Brewer & Watson, 

 Bot. California, i, 162. Vasey, Cat. Forest Trees, 12. Hemsley, Bot. Am.-Cent. i, 327. Watson in Proc. Am. Acad. xvii, 348. 



Corpus Christi, Texas, west along the Mexican boundary to the valley of the Colorado river, Arizona (Yunia); 

 and southward into Mexico; probably of American origin, but now widely naturalized throughout the tropical 

 and warmer regions of the globe (4- De Candolle, Geog. Bot. ii, 719, 770, 793). 



A small tree, 6 to 12 meters in height, with a trunk sometimes 0.30 meter in diameter. 



Wood heavy, hard, very close-grained, inclined to check in drying, containing many evenly-distributed small 

 open ducts ; medullary rays very numerous, thin, conspicuous; color, light brown, the very thick sap-wood lighter, 

 often tinged with yellow; specific gravity. 0.6116; ash, 2.32. 



