246 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



LEWISIA. 



Sepals 4 to 8; scape jointed and with an involucre of 5 to 7 bracts 1. L. rediviva. 



Sepals 2; scape 2-bracteolate. 

 Root elongate. 



Seeds granulate, conspicuously strophiolatc 2. L. tweedyi. 



Seeds smooth, not at all strophiolatc. 



Plants 2 to 8 cm. high; flowers 1 to 3. 



Sepals entire; petals white 3. L. nevadensis. 



Sepals erosc; petals red 4. L. pygmaea. 



Plants 10 to 20 cm. high; flowers several to many, red... . 5. L. coiumbiana. 

 Root glolx)se ; cauline leaves 2 or 3, linear d. L. triphylla. 



1. Lewisia rediviva Pursh, Fl. 2: 368. 1814. Rock rose. Bittekroot. 

 Type LOCALrnr: "On the banks of Clark's River." C*)llocted by Lewis. The exact place 



is the mouth of the Lou Lou fork of the Bitterroot River, Montana. 



Range: British Columbia to Wyoming, Arizona, and California. 



Specimens examined: Atanum River, Flett 1293; Wenache, Whited 1089; North Yakima 

 Henderson, May, 1892; Rock Creek, Sandberg cfe Leiberg 127; Major Creek, Suksdvrf 258; 

 Sprague, Henderson, May, 1892; Spokane County, Mrs. Tucker in 1892; Spokane, Piper, 

 July, 1896; without locality, Vasey in 1889; Ellensburg, Piper in 1897. 



Zonal distribution: Arid Transition. 



2. Lewisia tweedyi (A. Gray) Robinson in Gray, Syn. Fl. 1 : 268. 1895. 

 Calandrinia tweedyi A. Gray, Proc. Am. Acad. 22: 277. 1887. 



Type locality: " Wenatchee Mountains, Washington Territory." CoUected by Tweedy 

 and by Brandegee. 



Range: Wenache Mountains, Washington. 



Specimens examined: Mount Stuart, Tweedy 898; Brandegee; Sandberg ds Leiberg 346; 

 Wenache Mountains, Whited 1242. 



Zonal distribution : Canadian? 



3. Lewisia nevadensis (A. Gray) Robinson in Gray, Syn. Fl. 1 : 268. 4895. 

 Calandrinia nevadensis A. Gray, Proc. Am. Acad. 8: 623. 1873. 



Type locauty: "Subalpine region of Wahsatch and East Humboldt Mountains [Nevada] 

 and Sierra Nevada, California, at Summit and Cisco." 



Range: Washington to California and Utah. 



Specimens examined: Klickitat River, Flett 1275; Simcoe Hills, Howell 292; Wenache 

 Mountains, Elmer 472; Blue Mountains, Piper 2391; Wenache Mountains, Cotton 1235. 



Zonal distribution: Hudsonian. 



4. Lewisia pygxaaea (A. Gray) Robinson in Gray, Syn. Fl. 1 : 268. 1895. 

 Talinum pygmaea A. Gray, Am. Joum. Sci. II. 33 : 407. 1862. 

 Oreohroma pygmaea YiovfeW, Erythea 1: 33. 1893. 



Type locality: Rocky Mountains. 



Range: Washington and Oregon to Montana and Colorado. 



Specimens examined: Cascade Mountains, latitude 49°, Lycdl in 1860; Paradise Valley, 

 Flett 284; Mount Adams, Suksdorfd3&. 



5. Lewisia coiumbiana (Howell) Robinson in Gray, Syn. Fl. 1: 269. 1895. 

 Calandrinia coiumbiana Howell; Gray, Proc. Am. Acad. 22: 277. 1887. 



Type locality: "Mountains of Oregon and Washington Territory (coll. by Lyall as far 

 north as lat. 49°)." 



Range : British Columbia to Oregon in the Cascades and Olympics. 



Specimens examined: Olympic Mountains, Piper 2222; Cascade Mountains, latitude 49°, 

 Lyall in 1860; Goat Mountain, Allen 205; Olympic Mountains, Flett 128; Elmer 2690; 

 Mount Stuart, Elmer 1206; Sandberg & Leiberg 547; Brandegee 683; Head of Twisp River, 



