440 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



RHODODENDRON. 



Leaves evergreen; inflorescence terminal; flowers pink 1. ^. caJlfomicum. 



Leaves deciduous; inflorescence lateral; flowers white 2. R. alhiflorum. 



1. Rhododendron calif ornicum Hook. Bot. Mag. W: jH. ^863. 1855. . 



Rhododendron macrophyUum G. Don, Hist. Dichl. PI. 3: 843. 1834. 



Type locality: "From the mountains of California." 



Range: Washington to California in the coast region. 



Specimens examined: Whidby Island, Gardner 193; Mat Mats Bay, Binns, June 2, 

 1890; Goat Mountains, Allen, June, 1893; Seattle, Piper; near Unioa^City, Piper; Clal- 

 lam County, Elmer 2475. % 



Zonal DisTRiBtrrioN: Humid Transition. 



This species is closely related to the eastern R. maximum L., to which Hooker once 

 referred our plant. 



a. Rhododendron albiflonim Hook. Fl. Bor. Am. 2: 43. 1834. 



Cladothamnus cnmpanulatus Greene, Erythca 3: 65. 1895. 



Type LOCALm': "Alpine woods of the Rocky Mts." Collected by Drummond. 



Range : British Columbia to Oregon and Montana. 



Specimens examined: Olympic Mountains, Piper 387; Cascade Mountains, latitude 

 49°, Lyall in 1859-60; Mount Rainier, Piper 2049; Allen 216, 309a; Mount Adams, Suks- 

 dorf 435; Cascade Mountains, Henderson, August 5, 1892; Stevens Pass, Sandherg cfc Lei- 

 herg, August, 1893; head of Twisp River, Whited 209; Bridge Creek, Elmer 712; Nason 

 Creek, Sandherg <k Leiherg 663; without locality, Vaaey 365; Clallam Coimty, Elmer 2461. 



Zonal distbibution: Hudsonian. 



MENZIESIA. 



1. Menziesia ferruginea Smith, Ic. PI. 3: pi. 56. 1791. 



Memiesia urceolaris Salisb. Par. Lond. pi. 44. 1806. 



Memiesia glabella A. Gray, Syn. Fl. 2: 39. 1878. 



Type locality: "In Americae Iwrealis tractu occidentali copiosissime crescit." Col- 

 lected by Menzies. 



Range: Alaska to Oregon and Montana. 



Specimens examined: Olympic Mountains, Piper 2186, 2185; J. M. Grant in 1889; 

 Mason County, Piper 1079; Montesano, Heller 3868; Hoquiam, Lamb 1015; Cascade Moun- 

 tains, latitude 49°, LyaU; Silverton, BoucJc 121; Mount Rainier, Piper, August, 1895; Nis- 

 qually Valley, Allen 3; Mount Adams, Flett 1214; Suksdorf 5S7; Skamania County, SvJcs- 

 dorf, August 10, 1889; Stevens Pass, Sandberg & Leiberg 727; Stampede Tunnel, Hender- 

 *on 2418; Watson 254; Markham, Lamb 1115; without locality, Cooper; Mount Carlton, 

 Kreager 272; Ilwaco, Piper 4991. 



Zonal distribution: Canadian to Hudsonian. 



The characters relied upon by Doctor Gray to distinguish M. glabella break down 

 completely. 



LEDUM. 



Leaves oval or oblong, not revolute-margined 1. L. glandulosum. 



Leaves lanceolate, the margins revolute. 



Rusty-tomentose beneath 2. L. groenlandicum. 



Glaucous beneath 3. L. columbianum. 



1. Ledum glandulosum Nutt. Trans. Am. Phil. Soc. 8: 270. 1843. 



Type locality: "In the central chain of the Rocky Mountains on the sides of mountains 

 which close up Thomburg's ravine." Collected by Nuttall. 



Range: British Columbia to California and Wyoming. 



Specimens examined: Loomis, Elmer 574; near Lake Chelan, Gorman 583, 768. 



Zonal distribution: Hudsonian. 



