440 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
RHODODENDRON. 
Leaves evergreen; inflorescence terminal; flowers pink.............. 1. R. californicum., 
Leaves deciduous; inflorescence lateral; flowers white ...2..220222.. 2. R. albiflorum. 
1. Rhododendron californicum Hook. Bot. Mag. 11: pl. 4863. 1855. 
Rhododendron macrophyllum G. Don, Hist. Dich]. Pl. 3: 843. 1834. 
Type Locatitry: “From the mountains of California.’ 
Rance: 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 Union City, Piper; Clal- 
lam County, Flmer 2475. 
ZONAL DISTRIBUTION: Humid Transition. 
This species is closely related to the eastern R. marimum J.., to which Hooker once 
referred our plant. 
2. Rhododendron albiflorum Hook. FI. Bor. Am. 2: 43. 1834. 
Cladothamnus campanulatus Greene, Erythea 3: 65. 1895. 
Type Locatity: “Alpine woods of the Rocky Mts.” Collected by Drummond. 
Rance; 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, 3092: Mount Adams, Sufrs- 
dorf 435; Cascade Mountains, Henderson, August 5, 1892; Stevens Pass, Sandberg & Lei- 
berg, August, 1893; head of Twisp River, Whited 209; Bridge Creek, Elmer 712: Nason 
Creek, Sandberg & Leiberg 663; without loe ality, Vasey 365; Clallam County, Elmer 2461. 
ZONAL DISTRIBUTION: Hudsonian. 
MENZIESIA. 
1. Menziesia ferruginea Smith, Ic. Pl. 3: pl. 56. 1791. 
Menziesia urceolaris Salisb. Par. Lond. pl. 44. 1806. 
Menziesia glabella A. Gray, Syn. Fl. 2: 39. 1878. 
Tyre Locauity: “In Americae borealis tractu occidentali copiosissime crescit.’ Col- 
lected by Menzies. 
Rance: 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°, Lyall; Silverton, Bouck 121; Mount Rainier, Piper, August, 1895; Nis- 
qually Valley, Allen 3; Mount Adams, Flett 1214; Suksdorf 587: Skamania County, Suks- 
dorf, August 10, 1889; Stevens Pass, Sandberg & Leiberg 727: Stampede Tunnel, Hender- 
son 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. .20..0222.-2........... 2. 2. L. groenlandicum 
Glaucous beneath............22..2200.-2222.-.-.-..--.-....3 3. L. columbianum. 
1. Ledum glandulosum Nutt. Trans. Am. Phil. Soc. 8: 270. 1843. 
Type Locaity: “In the central chain of the Rocky Mountains on the sides of mountains 
which close up Thornburg’s ravine.” Collected by Nuttall. 
Rance: British Columbia to California and Wyoming. 
SPECIMENS EXAMINED: Loomis, Elmer 574; near Lake Chelan, Gorman 583, 768. 
ZONAL DISTRIBUTION: Hudsonian. 
