246 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
LEWISIA. 
Sepals 4 to 8; scape jointed and with an involucre of 5 to7 bracts......... 1. L. rediviva, 
Sepals 2; scape 2-bracteolate. 
Root elongate. 
Seeds granulate, conspicuously strophiolate.........-...-..-- 2. L. tweedyi. 
Seeds smooth, not at all strophiolate. 
Plants 2 to 8 em. high; flowers 1 to 3. 
Sepals entire; petals white .........---.-.--------- 3. L. nevadensis. 
Sepals erose; petals red..............------------- 4. L. pygmaea. 
Plants 10 to 20 cm. high; flowers several to many, red.... 5. L. columbiana. 
Root globose; cauline leaves 2 or 3, linear........-.-.----------- 6. L. triphylla. 
1. Lewisia rediviva Pursh, Fl. 2: 368. 1814. Rock ROsE. BITrERROOT. 
Type Locauity: “On the banks of Clark’s River.” Collected by Lewis. The exact place 
is the mouth of the Lou Lou fork of the Bitterroot River, Montana. 
Rance: British Columbia to Wyoming, Arizona, and California. 
SPECIMENS EXAMINED: Atanum River, Flett 1293; Wenache, Wiited 1089; North Yakima 
Henderson, May, 1892; Rock Creek, Sandberg & Leiberg 127; Major Creek, Suksdorf 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 Locauity: “ Wenatchee Mountains, Washington Territory.”’ Collected by Tweedy 
and by Brandegee. 
Rance: Wenache Mountains, Washington. 
SPECIMENS EXAMINED: Mount Stuart, Tweedy 898; Brandegee; Sandberg & Leiberg 346; 
Wenache Mountains, Whited 1242. 
ZONAL DISTRIBUTION: Canadian? 
3. Lewisia nevadensis (A. Gray) Robinson in Gray, Syn. Fl. 1: 268. 1895. 
Calandrinia nevadensis A. Gray, Proc. Am. Acad. 8: 623. 1873. 
Type Loca.ity: “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 pygmaea (A. Gray) Robinson in Gray, Syn. Fl. 1: 268. 1895. 
Talinum pygmaea A. Gray, Am. Journ. Sci. IL. 33: 407. 1862. 
Oreobroma pygmaea Howell, Erythea 1: 33. 1893. 
TypPE LocaLity: Rocky Mountains. 
Rance: Washington and Oregon to Montana and Colorado. 
SPECIMENS EXAMINED: Cascade Mountains, latitude 49°, Lyall in 1860; Paradise Valley, 
Flett 284; Mount Adams, Suksdorf 336. 
5. Lewisia columbiana (Howell) Robinson in Gray, Syn. Fl. 1: 269. 1895. 
Calandrinia columbiana Howell; Gray, Proc. Am. Acad. 22: 277. 1887. 
Tyre Loca.tty: “ Mountains of Oregon and Washington Territory (coll. by Lyall as far 
north as lat. 49°).”’ 
Rance: 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, 
