48 FOREST TREES OF NORTH AMERICA. 



A. barbatvm, Donglas in Hooker, Fl. Bor.-Am.i, 113. Loudon, Arboretum, i, 420, f. 126 (excl.syn.)' 



A. Douglamiy Hookur in Loudon Jour. Bot. vi, 77, t. 6. 



A. tripartitum, Nuttall in Torrey & Gray, Fl. N. America, i, 247. Dietrich, Syn. ii, 1281. Eaton & Wright, Bot. 112. 

 Walpers, Rep. i, 409. Nuttall, Sylva, ii, 85, t. 71 ; 2 ed. ii, 33, t. 71. Gray in Mem. Am. Acad, new ser. iv', 28; Paoifio 

 R. B. Rep. iv, TA Newberry in Pacific R. B. Eep. vi, 69. 



DWARF MAPLE. 



British Columbia, valley of the Fraser river and probably farther north, south through Washington temtory, 

 Oregon, and along the Sierra Nevada of California to the Yosemite valley; east along the mountain ranges of Idaho 

 and Montana to the eastern base of the Eocky mountains, south through Colorado and Utah, in the east Humboldt 

 Bange, Nevada, and in the mountain ranges of western New Mexico and eastern Arizona. 



A small tree, 8 to 12 meters in height, with a trunk sometimes 0.30 meter in diameter, or more often reduced 

 to a low shrub 1 to 2 meters in height; borders of streams, reaching its greatest development in the mountain 

 canons of western New Mexico and eastern Arizona. 



Wood heavy, hard, close-grained, compact; medullary rays numerous, thin; color, light brown, or often nearly 

 vbite, the sap- wood lighter; specific gravity, 0.6028; ash, 0.30. 



63. Acer grandidentatum, Nuttall; 



Torrey & Gray, Fl. N. America, i, 247. Dietrich, Syn. ii, 1283. Eaton & Wright, Bot. 112. Walpers, Rep. i, 409. Nuttall, Sylva, li, 

 82, t.69; 2ed. ii, 29, t. 69. Watson in King's Rep. v, 52; PI. Wheeler, 7. Porter in Hayden's Rep. 1871, 480. Vasey, Cat. Forest 

 Trees, 10. Parry in Am. Nat. ix, 201, 2()8. Rothrock in Wheeler's Rep. vi, 83. Rnsby in Bull. Torrey Bot. Club, ix, 106. 

 Watson in ProcJ Am. Acad, xvii, 338. Nicholson in London Gard. Chronicle,. 1881, 172. 



Western Montana, headwaters of the Columbia river {Nuttall), canons of the Wahsatch mountains, Utah, and 

 south through eastern Arizona to southwestern New Mexico (Mogollon mountains, E. L. Greene), and reported in 

 the ranges east of the Kio Grande ; southward into Coahuila [Palmer). 



A small tree, rarely exceeding 10 meters in height, with a trunk 0.20 to 0.25 meter in diameter; along streams; 

 not common. 



Wood heavy, hard, close-grained, compact; medullary rays numerous, thin, distinct; color, light brown, or 

 often nearly white; specific gravity, 0.6902; ash, 0.64. 



64. Acer saccharii^um, Wangenheim, 



Amer. 36, 1. 11, f. 26. Lamarck, Diet, ii, 379. Walter, Fl. Caroliniana, 251. Alton, Hort. Kew. iii, 434; 2 ed. v, 447. Ehrhart, Beitr. 

 iv, 24. Persoon, Syn. i, 417. Nonveau Dnhamel, iv, 29, t. 8. Willdenow, Spec, iv, 985; Enum.ii, 1044. Desfontaines, Hist. Arb. 

 i, 392. Trattinick, Archiv. i, t. 3. Michaux f. Hist. Arb. Am. ii, 218, 1. 15 ; N. American Sylva, 3 ed. i, 153, t. 42. Titford, Hort. 

 Bot. Am. 105. Pursh, Fl. Am. Sept. i, 266. Eaton, Manual, 44; 6 ed. 2. Nuttall, Genera, i, 253. Hayne, Dend. Fl. 214. Elliott, 

 Sk. i, 450. Richardson, Franklin Jo>ir. 26; Arctic Exped. 422. De CandoUe, Prodr. i, 595. Torrey, Fl. U. S. 396; Compend. Fl. N. 

 States, 170; Fl. N. York, i, 135. Sprengel, Syst. ii, 225. Pcnu. Cycl. i, 79. Hooker, Fl. Bor.Am. i, 113. Don, Miller's Diet. 1, 

 650. Beck, Bot. 63. Bigelow, Fl. Boston. 3 ed. 406. Spach, Hist. Veg. iii, 170 ; Ann. Sci. Nat. 2 ser. ii, 99. Loudon, Arboretum, i, 

 411, t. 31, f. 122.- Torrey & Gray, Fl. N. America, i, 248. Eaton & Wright, Bot. 112. Dietrich, Syn. ii, 1282. Walpers, Rep. i, 410. 

 Nees, PI. Med. 5. Nuttall, Sylva, ii, 88; 2ed. ii,35. Browne, Trees of America, 83. Emerson, Trees Massachusetts, 480 ; 2 ed. 

 ii, 258 & t. Gray, Genera, ii, 200, 1. 174 ; Manual N. States, 5 ed. 119. Darlington, Fl. Cestrica, 3 ed. 45. Darby, Bot. S. States, 

 265. Parry in Owen's Rep. 610. Chapman, Fl. S. States, 80. Lesquereux in Owen's 2d Rep. Arkansas, 354. Wood, CI. Book, 

 286 ; Bot. & Fl. 74. Porcher, Resources S. Forests, 80. Engelmann in Trans. Am. Phil. Soc. new ser. xii, 187. Young, Bot. Texas, 

 206. Vaaey, Cat. Forest Trees, 10. Gnibourt, Hist. Drogues, 7 ed. iii, 606. Ward in Ball. U. S. Nat. Mus. No. 22, 73. Sears in Bull. 

 Essex Inst, xiii, 175. Bell in Geological Rep. Canada, 1879-'80, 51^.- Ridgway in Proc. U. S. Nat. Mus. 1882, 62. 



A. saccharum, Marshall, Arbustum, 4. 



A. barhatum, Michaux, Fl.Bor.-Am.ii,253. Willdenow, Spec iv,989.Poiret, Suppl.ii, 575. Pursh, Fl. Am. Sept.i, 266. 

 Nuttall, Genera, i, 255. Elliott, Sk.i, 451. De Candolle, Prodr. i, 505. Torrey, Fl. U.S. 396; Compend. Fl. N. States, 

 169. Eaton, Manual, 6 ed. 2. Sprengel, Syst. ii, 224. Don, Miller's Diet! i, 649. Beck, Bot. 63. Spach, Hist. Veg. 

 iii, 178; Ann. Sci. Nat. 2 ser. ii, 118. Torrey & Gray, Fl.N. America, i, 249, 684. Eaton & Wright, Bot. 112. Curtis 

 in Rep. Geological Surv. N. Carolina, 1860, iii. 51. 



SUGAR MAPLE. Sl'GAK TREE. HARD MAPLE. BOOK MAPLE. 



Southern Newfoundland, valleys of the Saint Lawrence and Saguenay rivers, shores of lake. Saint John, 

 west along the northern shores of the great lakes to Lake of the WoofJs ; south through the northern states and 

 along the Alleghany mountains to northern Alabama and the Chattahoochee region of west Florida (var. 

 Floridanum, Chapman, I. c.) ; west to Minnesota, eastern Nebraska, eastern Kansas (rare), and eastern Texas. 



A tree of great economic value, 24 to 36 meters in height, with a trunk 0.60 to 1.20 meter in diameter, or 

 toward its southwestern limits greatly reduced in size; rich woods, often forming extensive forests, and reaching 

 its greatest develoi)ment in region of the great lakes. 



