PIPER FLORA OF THE STATE OF WASHINGTON. 219 



3. Betula microphylla Bunge, Mem. Acad. St. Petersh. VI. 2 : 60(1 1X3.5. 



Beiida fontinalis Sargent, Bot. Gaz. 31 :239. 1901. 



Type locality: "Hab. ad Tschujae ripam in deserto ouraioo," Siberia. 



Range: British Columbia to Alberta, south to California and New Mexico. Siberia. 



Speclviens examined: Wonache, Whited lOOS; Coulee City, Lake <& Hull 7 90-, Spokane, 

 Sandherg cfc Leiheig in 1S93; Hangman Creek, Sandberg cfc Leiberg 76; Pullman, Elmer 882; 

 Touchet River, Waitsburg, Piper, July 19, 1896; Almota, Piper 1642, April 20, 1895; 

 without locality, Vasey in 1889; ten miles southwest of Pullman, Piper 3808, 3806; Con- 

 conull}', Griffiths & Cotton 317; Wenache, Griffiths & Cotton 149; (Vjlville Reservation, 

 Griffiths (& Cotton 380. 



Zonal distribution: Arid Transition. 



The Almota specimens form the basis for the third unnamed .species in the Flora of the 

 Palouse Region. This is a tall graceful tree with drooping branches, appearing very dif- 

 ferent from the ordinary form of B. microphylla, and probably distinct from it. 



ALNUS. Ai,dek. 



Leaves simply denticulate, not at all lolled 1 . ,4. rhomhifolia. 



Leaves doubly dentate and more or less lobed. 



Pedimcles .slender, longer than the cones; shnil) witli shining l(>aves. 2. .4. sinnata. 

 Peduncles shorter than the cones; leaves dull. 



Winter buds acute; leavesrusty pubescent on the veins beneatli. 3. A. oregona. 

 Winter buds ol>tuse; leaves pubescent but not rusty 4. ^. tenuifolia. 



1. Alnus rhonibifolia Xutt. Sylva 1: 33. 1X42. 

 Type locality: ilonterey, California. 



Range: British Columl)ia to Idaho and California. 



Specimens examined: Bingen, j§(/A'.S(/o;/224; Satus Creek, S/'ancZej/ff 1078; Blue Moun- 

 tains, Piper, August 2, 1X96; Almota, Piper 163.5, May 2, 1897; September 9, 1896; Wa- 

 wawai. Piper ; Elmer 896. 



Zonal distribution: Upper Sonorun. 



2. Alnus sinuata (Regel) Rydberg, Bull. Torr. Club 24: 190. 1897. 

 Alnus viridis sinuata Regel in DC. Prod. 26-': 183. 18()X. 



Type locality: Kamchatka. 



Range: Alaska to Oregon and Colorado. Sil)eria. 



Specimens examined; Cascade Mountains, latitude 49°, Lyall in 1860; Seattle, Piper, 

 July 4, 1897; Baldy Peak, Lamh 1341 ; OlTOipia, Henderson; Steilacoom, Cooper; Silverton, 

 BoucTc 168; Nisqually Valley, Allen 309; Klickitat River, Flett 1347; Chambers Lake, 

 Henderson, June 20, April 10, 1892; Nason Creek, Sandberg <& Leiberg 609; Bridge Creek, 

 Elmer 711; Blue Mountains, P/yw 241.5: without locality, Pr/.w;/ in 18X9; Steli(>kin, 6'/(//(7/*.v 

 c& Cotton 218. 



Zonal distribution: Iludsonian to Transition. 



A species of wide altitudinal range, most abundant along sui)alpine streams, l)ut occa- 

 sionally occuring at sea level. It is usually a .shrul), but sometimes truly arl)orescent. It 

 has been confused with the eastern .4. viridis DC. 



3. Alnus oregona Nutt. vSylva 1; 28. 1842. Red alder. 

 Alnus rubra Bong. Mem. Acad. St. Petersl). VI. 2: 162. 18:^7, not Bdula-idnus rubra 



Marsh. 178-5. 



Type locality: "In our progress to the west we first ob.served this tree on the borders 

 of the Rivers Boisee and Brulee, which pass into the Shoshonee not far from Walla WaUa, 

 and at intervals it continues more or less common to Point Chinook, near the shores of the 

 Pacific." Nuttall has here confused two species, as A. oregona occurrs only west of the 

 Cascade Mountams. 



Range: Alaska to middle California in the coast region. 



