218 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
SPECIMENS EXAMINED: Cohasset, Lamb 1122; Ilwaco, Henderson, September 9, 1892; 
Westport, Heller 394; Henderson, June 26, 1892; Ilwaco, Piper 4952. 
ZONAL DISTRIBUTION: Humid Transition. 
BETULACEAE. Brrcw FAmIty. 
Fruit a nut inclosed in a leafy involucre..............-2...-.------2--------- CorYLUS. 
Fruit cone-like, without involucre. 
Cone seales deciduous........-.-.--..---.-2-2---- 02-22-22 ee ee ee ee BETuLa. 
Cone scales persistent ......-...-.-.-2-.-2-2-2-2-- cee eee eee ee ee eee ALNUs. 
CORYLUS. 
1. Corylus californica (A. DC.) Rose, Gard. & For. 8: 263. 1895. Haze. 
Corylus rostrata californica A. DC. Prod. 17?: 133. 1864. 
Corylus americana Walt. err. det. Cooper, Pac. R. Rep. 12?: 68. 1860. 
TYPE LOCALITY: Santa Cruz, California. 
Rance: British Columbia to California. 
SPECIMENS EXAMINED: Montesano, Heller 3971; Seattle, Piper 189; west Klickitat County, 
Suksdorf 1214; Sumas, Lyall; Fort Colville, Watson; without locality, Vasey in 1889; Box 
Canyon, Kreager 410; Kettle Falls, Beattie & Chapman 2191. 
ZONAL DISTRIBUTION: Transition. 
BE TULA. Bircu. 
Branchlets glandular-warty. 
Shrub about 1 meter high; leaves glabrous...............--.--- 1. B. glandulosa. 
Shrub or tree 3 to 6 meters high; leaves sparsely pubescent... ... 3. B. microphylla. 
Branchlets not glandular-warty; tree with gray bark.............-.- 2. B. occidentalis. 
1. Betula glandulosa Michx. FI. 2: 180. 1803. 
TYPE Locality: “Circa lacus, a sinu Hudsonis ad Mistassins.”’ 
Rance: Oregon and Colorado to New England and northward. 
SPECIMENS EXAMINED: Cascade Mountains, latitude 49°, Lyall in 1860; Seattle, Piper, 
May 25, 1891; Tacoma, Flett 29; Steilacoom, Piper 183; McAllisters Lake, Henderson, June 
22, 1892; Klickitat County, Suksdorf; Falcon Valley, Suksdorf; Klickitat River, Flett 1344. 
ZONAL DISTRIBUTION: Canadian? Always found in sphagnum bogs. 
2. Betula occidentalis Hook. Fl. Bor. Am. 2: 155. 1839. 
Betula piperi Britt. Bull. Torr. Club 31: 165. 1904. 
Tyre Loca.ity: “Straits of De Fuca.”’ Collected by Scouler. 
Rance: British Columbia, Washington, and Idaho. 
SPECIMENS EXAMINED: Gulf of Georgia, Henderson in 1888; Everson, Piper, September, 
1892; Sumas Prairie, Lyall in 1858-59; Cascade Mountains, latitude 49°, Lyall in 1859; 
Tukanon River, Lake & Hull, July 5, 1892; Blue Mountains, Piper, July 15, 1896; ten miles 
southwest Pullman, Paper 3807. 
ZONAL DISTRIBUTION: Transition. 
This is the Betula lutea Michx.? of Suksdorf’s List. 
A variable tree as it occurs in Washington and perhaps only a subspecies of the eastern 
B. papyrifera. Typical occidentalis occurs in northwestern Washington, where it is a rather 
dark-gray barked tree, occasionally 3 feet in diameter. The very similar tree in Stevens 
County and in the Blue Mountains is somewhat smaller in size and often white-barked. The 
name Betula prperi was meant by its author to apply to the third unnamed species in the 
Flora of the Palouse Region, but the specimen actually cited is the eastern Washington form 
of B. occidentalis Hook. 
