330 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Olympic Mountains, Piper 1992; Elmer 2531; Cascade Moun- 

 tains, latitude 49°, Lyall in 1859; Silverton, Bouck 51; Mount Rainier, AUen V22,; Piper 

 2041; Mount Adams, Henderson, August, 1892; Suksdorf, September, 1877; Skagit Pass, 

 Lake cfe HuU 491; between Cascade Mountains and Colville, Lyall in 1860; Nason Creek, 

 Sandberg cfc Leiberg 655; Bridge Creek, Elmer 639; without locality, Vasey in 1889. 



Zonal distribution: Arctic. 



SCHIZONOTUS. 



1. Schizonotxis discolor (Pursh) Raf. New Fl. 3: 75. 1836. Ocean spray. 



Ilolodiscus discolor Maxim. Act. Ilort. Petrop. 6: 254. 1879. 



Spiraea discolor Pursh, Fl. 1 : 342. 1814. 



Spiraea ariaefolia Smith, Rees Cj'cl. 33: no. 16. 1816. 



Type uxjauty: "On the banks of the Kooskoosky." Collected by Lewis. 



Ranob: B:-itish Columbia to Idaho and California. 



Specimens e.\amined: Clallam County, Elmer 2522; Cascade Mountains, latitude 49", 

 Lyall in 1859; Seattle, Piper 64; Port Ludlow, Binns; near Satsop, Heller 4025; 

 upper Nisqually Valley, Allen 2; Atanum Soda Springs, Watt, August, 1895; Skagit Pass, 

 Lake cfc Hull, August, 1892; Fort Vancouver, Tdmie; Peshastin, ^anrfter^ cfc Leiberg 478; 

 Wenache, Whited 1176; EUensburg, Whited 543; Cowichc Creek, 6*o«on 466; Horseshoe 

 Basin, Elmer 708; without locality, Vasey in 1889; Tukanon River, Lake cfc Hull 512; Loon 

 Lake, Winston, July 20, 1897; Clarks Springs, Kreager 78; Mount Carlton, Kreager 261. 



Zonal distribution: Transition, larely Upper Sonoran. 



SPIRAEA. 



Low depressed shrubs with entire leaves. 



Calyx lobes acute ; leaves canescent I. S. cinerascens. 



Calyx lobes obtuse ; leaves glabrous 2. S. hendersonii. 



Taller shrubs with serrate or incised leaves. 

 Inflorescence pyramidal. 



Leaves tomentose beneath ; flowers red 3. <S. douglasii. 



Leaves glabrous beneath. 



Flowers red i. S. memiesii. 



Flowers white ; b. S. pyramidata. 



Inflorescenc* flat-topped. 



Flowers red, crowded 6. S. densifiora. 



Flowers white, looser 7. S. corymbosa. 



1. Spiraea cinerascens Piper, Erythea 7: 171. 1899. 



Type locality: "On bluffs of the Columbia River, Wash., 12 miles south of Chelan, in 

 crevices of basaltic rock." Collected by Elmer. 

 Range: Known only from the type collection. 

 Specimens examined: Okanogan County, Elmer 910. 



2. Spiraea hendersoni (Canby) Piper, Erythea 7: 171, 172. 1899. 

 Lutkea hendersoni Greene, Pittonia 2 : 219. 1892. 



Eriogynia hendersoni Canby, Bot. Gaz. 16: 236. 1891. 

 Type locality: Mount Steele, Olympic Mountains, Washington. 

 Range: Olympic Mountains. 



Specimens examined: Olympic Mountains, Piper 910, 1991; Elmer 2517; Henderson 

 1874; Baldy Peak, Lamb 1374; Mount Storm King, Lawrence 344. 

 Zonal distribution: Hudsonian. 



3. Spiraea douglasii Hook. Fl. Bor. Am. 1 : 172. 1830. 



Type locality: "North West coast of America about the Columbia and the Straits of 

 De Fuca." Collected by Douglas and by Scoulei. 

 Range: British Columbia to Oregon in the coast region. 



