CATALOGUE OF FOREST TREES. 73 



119. Pyrus rivularis, Douglas; 



Hooker, Fl. Bor.-Am. i, 203, t. 68. Don, Miller's Diet, ii, 647. Torrey & Gray, Fl. N.America, i, 471. Eaton & Wright, Bot. .383.' 

 Walpers, Rep. ii, 53. Dietrich, Syn. iii, 154. Ledebour, Fl. Eossica, ii, 99. Nuttall, Sylva, ii, 22, t.49 ; 2 ed. i, 172, t. 49. Eichardson, 

 Arctic Exped. 428. Torrey in Pacific E. E. Eep. iv, 85 ; Hot. Wilkes Exped. 292. Newberry in Pacific R. E. Eep. vi, 73. Cooper 

 in Smithsonian Eep. 1858, 259 ; Pacific E. E. Eep. xii, 29, 60. Eothrock in Smithsonian Eep. 1867, 435, 446. Koch, Dendrologie, 

 i, 212. Gray in Proc. Am. Acad, viii, 382. Wenzig in Linntea, xxxviii, 38. Brewer & Watson, Bot. California,!, 188. Vasey, 

 Cat. Forest Trees, 14. Hall in Coulter's Bot. Gazette, ii, 87. Macoun in Geological Eep. Canada, 1875-'76, 185. Dawson in 

 Canadian N^t. new ser. ix, 330. 



P. diversifoKa, Bongard in Mem. Acad. Sci. St. Petersburg, 6 ser. ii, 133. 



P. fusca, Eafinesque, Med. Bot. ii, 254. 



P. subcordata, Ledebour, Fl. Eossica.-ii, 95. ^ 



Malus rivularis, Ecemer, Syn. Mon. iii, 215. Decaisne in Nouv. Arch. Mus. x, 155. 



Mains diversifolia, Ecemer, Syn. Mon. iii, 215. Decaisne in Nouv. Arch. Mus. x, 155. ' 



Malus subcordata, Roemer, Syn. Men. iii, 192. 



OREGON CRAB APPLE. 



Coast of Alaska, southward along the coast and islands of British Columbia, through Washington territory 

 and Oregon, west of the Cascade mountaias, to Sonoma county, California. 



A small tree, sometimes 9 meters in height, with a trunk 0.30 to 0.45 meter in diameter; rich, low woods, 

 generally along streams, often forming dense thickets. 



Wood heavy, hard, very close-grained, liable to check badly in drying, susceptible of a beautiful polish; 

 medullary rays numerous, obscure; color, light brown tinged with red, the sap-wood lighter; specific gravity, 

 0.8316 ; ash, 0.41 ; used for mallets, mauls, bearings of machinery, etc. 



The small, black, pleasantly acid fruit occasionally used as a preserve, and prized by the Indians as food. 



120. Pyrus Americana, De Candolle, 



Prodr. ii, 637. Watson, Dend. Brit. i. t. 54. Sprengel, Syst. ii, 511. Hookir, Fl. Bor.-Am. i, 204. Don, Miller's Diet, ii, 648. Beck, 

 Bot. 113. Audubon, Birds, t. 363. Torrey & Gray, Fl. N. America, i, 472. Loudon, Arboretum, iii, 920 & t. Eaton & Wright, 

 Bot. 383. Torrey, Fl. N. York, i, 224. Dietrich, Syn. iii, 155. Nuttall, Sylva, ii, 25, t. 50; 2 ed. i, 175, t. 50. Browne, Trees of 

 America, 326. Emerson, Trees Massachusetts, 439 ; 2 ed. ii, 499. Parry in Owen's Eep. 612. Eichardson, Arctic Exped. 428. 

 Lange, PI. Groenl. 134. Cooper in Smithsonian Eep. 1858, 252. Chapman, Fl. S. States, 129. Curtis in Eep. Geological Surv. 

 N. Carolina, 1860, iii, 70. Wood, CI. Book, 333; Bot. & Fl. 112. Porcher, Resources S. Forests, 168. Gray, Manual N. States, 

 5 ed. 161. Koch, Dendrologie, i, 190. Brewer & Watson, Bot. California, i, 189. Vasey, Cat. Forest Trees, 14. Macoun in 

 Geological Eep. Canada, 1875-'76, 195. Sears in Bull. Essex Inst, xiii, 176. Bell in Geological Rep. Canada, 1879-'80, 54"=. 



Sorbus Americana, Marshall, Arbustum, 145. Willdenow, Enum. 520. Pursh, Fl. Am. Sept. i, 341. Poiret, Suppl. v, 

 164. Eaton, Manual, 55; 6 ed. 351. Nuttall, Genera, i, 305. Hayne, Dend. Fl. 75. Torrey, Fl .U. S. 477 ; Compend. 

 Fl. N. States, 202. Spach, Hist. Veg. ii,95. Bigelow, Fl. Boston. 3ed. 207. Rcemer, Syn. Mon. iii, 138. Maximowicz 

 in Bull. Acad. St. Petersburg, xix, 174. Wenzig in Linnaea, xxxviii, 71. Decaisne in Nouv. Arch. Mus. x, 158. 



Sorbus aueuparia, Poiret in Lamarck, Diet, vii, 234, in part. Bigelow, Fl. Boston. 1. ed. 119. Decaisne in Nouv. Arch. Mus. 

 X, 15(5, in part. 



Sorbus aueuparia, var. Americana, Persoon, Syn. ii, 38 & addend. 



P. aueuparia, Meyer, PI. Labrador, 81, in part. Schleohtendal in Linnaea, x, 99. Hooker f. in Trans. Linnsean Soo. xiii', 

 290, 327, in part. 



Sorbus humifusa, Raflnesque, Med. Bot. ii, 265. 



MOUNTAIN ASH. 



Greenland !, Labrador, Newfoundland, Anticosti island, and westward along the southern shore of James' bay 

 to the valley of the Nelson river (White Mud falls), southward through all mountainous regions of the northeastern 

 states, and along the high mountains of Virginia and North Carolina; in northern Michigan, Wisconsin, and 

 Minnesota. 



A small tree, to 9 meters iu heii^lit, with a trunk 0.30 to 0.45 meter in diameter; borders of swamps and in 

 moist, rocky woods, reaching its greatest develoi^ment on the northern shores of lakes llurou and Superior. 



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