PIPER FLORA OF THE STATE OF WASHINGTON. 305 



Specimens examined: Charleston, Piper, July 21, 1895; Coulee City, Piper 3877; 

 between Coulee City and Waterville, SpHlman, May, 1896. 

 Zonal distribution: Upper Sonoran. 



3. Lepidium menziesii DC. Syst. 2: 539. 1821. 



Type locality: "Hab. in ora occidentali Americae borealis." Collected by Menzies. 



Range: British Columbia to Oregon, near the seashore principally. 



Specimens examined: Clallam County, Elmer 2697; Iloquiam, Lamb 1153; Fairhaven, 

 Piper 2787; San Juan Island, Lyall in 1858; Seattle, Piper 444; White Salmon, Suksdorf 

 242; Seattle, Henderson 77. 



Zonal distribution: Humid Transition. 



This species was formerly confused with L. virginicum L., which does not occur in Wash- 

 ington. 



4. Lepidium medium Greene, Erythea 3 : 36. 1895. 



Lepidium intermedium A. Gray, PI. Wright. 2: 15. 1853, not Richard. 



Type locality: "Ravines of the Organ Mountains, northeast of El Paso," Texas. 



Range: Washington and Idaho to California and Texas. 



Specimens examined: Lake Cushman, Henderson 2045; Cascade Mountains, latitude 

 49°, LyaU in 1859; Bingen, Suksdorf 2362; Wawawai, Lake cfc HuU 479; Piper 3063, 3533, 

 3811; Waitsburg, Horner 4. 



Zonal distribution: Upper Sonoran. 



6. Lepidium nitidum Nutt.; Torr. & Gr. Fl. 1: 116. 1838 



Type locality: Near Santa Barbara, California. 



Range: Washington to California. 



Specimens examined: Klickitat County, Howell, June, 1879; Rockland, Suksdorf 241; 

 Granddalles, Gorman, April, 1895. 



Zonal distribution: Upper Sonoran. 



6. Lepidium dictyotum A. Gray, Proc. Am. Acad. 7: 329. 1868. 



Type locality: "Nevada, at Steamboat Springs." 



Range: Washington to Nevada and California. 



Specimens examined: Klickitat County, Suksdx)rf 844; Sprague, Sandberg <& Leiberg 

 138; Duck Lake and Crab Creek, Suksdorf 244; Walla Walla, Brandegee 646; Waitsburg, 

 Horner 604; Bolles Junction, Horner 607. 



Zonal distribution: Arid Transition. 



THLASPI. 



Pods large, winged, deeply notched; annual 1. T. arvense. 



Pods small, scarcely winged or notched; perennials. 



Leaves grpen, not glaucous 2. T. alpeslre. 



Leaves glaucous 3. T. glaucum. 



1. Thlaspi arvense L. Sp. PI. 2: 646. 1753. Penny cress. 

 Type locality: European. 



Specimens examined: Pullman, Elmer, June, 1897. 



2. Thlaspi alpestre L. Sp. PI. ed. 2. 2: 903. 1763. 

 Type locality: " Habitat in Austria. " 



Range: British Columbia and Montana to Mexico. Europe. Asia. 



Specimens examined: Thirty miles south of Mount Adams, Flett 1132; Mount Rainier, 

 Flett 227; Mount Stuart, Elmer 1210; Sandberg cfc Leiberg 811; Yakima County, Henderson 

 2386; upper Nisqually Valley, AUen 300. 



Zonal distribution: Arctic. 

 29418—06 M 20 



