CATALOGUE OF FOREST TREES. 163 



301. Alnus rubra, Bongard, 



Mem. Acad. St. Petersburg, 6 ser. ii, 162. Hooker, Fl. Bor.-Auj. ii, 15ci. Spach iu Ann. Sci. Nat. 2 ser. xv, 205. Endlicher, Genera, 

 Suppl. iv 2 , 21. Lyall in Jour. Linuaean Soc. vii, 134. Rcgel in Bull. Soc. Nat. Moscow, xxxviir 1 , 429; De Candolle, Prodr. xvi", 

 lg<5. Torrey, Bot. Wilkes Exped. 467. Watson, Bot. California, ii, riO. G. M. Dawson in Canadian Nat. new ser. ix, 331. 



fA. glutinosa, Pursh.Fl. Am. Sept. ii,622 [not Willdenow]. 



A. Oregana, Nuttall, Sylva, i,28,t. 9; 2 ed. i,44,t. 9. Newberry in Pacific R. R. Rep. vi, 25, 89. Cooper in Smithsonian 

 Rep. 1856, 261 ; Pacific R. R. Rep. xii 2 , 28, 68. Vasey, Cat. Forest Trees, 28. Hall in Coulter's Bot. Gazette, ii, 91. 



A. incana, var. rubra, Regel in Mem. Soc. Nat. Moscow, xix, 157, t. 17, f. 3-4. 



ALDER. 



Sitka, south through the islands aud Coast ranges of British Columbia, Washington territory, Oregon, and 

 California to Santa Barbara, extending east through the Blue mountains to northern Montana. 



A large tree, 24 to 30 meters in height, with a trunk 0.90 to 1.20 meter in diameter, or in British Columbia 

 and the Blue mountains often reduced to a low shrub; river bottom lauds and borders of streams; most common 

 and reaching its greatest development along the large streams of western Washington territory and Oregon. 



Wood light, soft, not strong, brittle, very close-grained, compact, easily worked, satiny, susceptible of a 

 beautiful polish; medullary rays distant, broad; color, light brown tinged with red, the sap-wood nearly white; 

 specific gravity, 0.4813 ; ash, 0.42 ; largely used in Oregon in the manufacture of furniture. 



302. Alnus rhombifolia, Nuttall, 



Sylva, i, 33; 3 ed. i, 49. Torrey, Bot. Wilkes Exped. 467. Vasey, Cat,. Forest Trees, 28. Watson, Bot. California, ii, 80. 

 A. glutinosa, var. serrulata, Regel in Mem. Soc. Nat. Moscow, xix, 164, in part. 



A. serrttklta, var. rugosa, Regel in Bull. Soc. Nat. Moscow, xxxviii 4 , 432, in part; De Candolle, Prodr. xvi s , 188, in part. 



ALDER. 



Valley of the lower Eraser river, British Columbia, south through the Coast ranges to southern California, 

 extending east aloug the ranges of Washington territory to Clear creek, Idaho ( Watson), and the valley of the 

 Flathead river, Montana (Cnnby <& Sargent}. 



A small tree, 9 to 15 meters in height, with a trunk sometimes 0.60 to 0.90 meter in diameter, or toward its 

 northern and eastern limits reduced to a shrub; borders of streams; the common alder of the California valleys. 



Wood light, soft, not strong, brittle, close-grained, compact; medullary rays numerous, obscure; color, light 

 brown, the sap-wood lighter, often nearly white; specific gravity, 0.4127; ash, 0.31. 



303. Alnus oblongifolia, Torrey, 



Bot. Mex. Boundary .Survey, 204. Cooper iu Smithsonian Rop. 1858, 206. Watson in PI. Wheeler, 17; Bot. California, ii, 80. 

 Roturoqfe in Wheeler's Rep. vi, 239. Rusby in Bull. Torrey Bot. Club, ix, 79. 



A. serrulata, var. oblongifolia, Regel in Bull. Soc. Nat. Moscow, xxxviii 4 , 443; De Candolle, Prodr. xvi 2 , 188. 



ALDER. 



San Bernardino and Cayumaca mountains, California, through the ranges of southern Arizona and southern 

 New Mexico to the valley of the Rio Grande; southward into Mexico. 



A tree 15 to 21 meters in height, with a trunk 0.90 to 1.20 meter in diameter; borders of streams in deep 

 mountain canons. 



Wood light, soft, not strong, brittle, close-grained, compact; medullary rays numerous, very obscure; color, 

 light brown tinged with yellow, the sap-wood nearly white; specific gravity, 0.3981; ash, 0.42. 



