80 MISSOUEI BOTANICAL GARDEN. 



and foot hills, British Columbia to Oregon, Nevada, Da- 

 kota and Kansas. Specimens examined fromQu'Appelle 

 (Macoun, 1879, 192 and 1534) and Swift Current, in 

 British America (Macoun, 1884); and from Washington 

 (Brandegee, 1883, 1067; Suksdorf, 1886,896), Oregon 

 (Spalding; Buckley, 1855; Lyall, 1860; Howell, 1880 

 and 1881; Gusick, 1881, 983; Henderson, 1886, 103), 

 Montana (Hayden, 1860; Scribner, 1883, 247; Tweedy, 

 1888, 104), Wyoming (Hayden, 1853-4), Dakota 

 (Hayden, 1853; Glatfelter, 1865, 376; Vasey, 1868, 

 499; Ganby, 1883, 278; Manning, 1884), Nevada, (An- 

 del-son', 1865, 243; Watson, 1868, 1048), Utah (Hayden, 

 1859 ; Jones, 1880, 1729), Colorado (Hall and Harbour, 

 1862,495; Parry, 1867, 186 ; Brandegee, 1874; Farwell, 

 1890), and Kansas (Damon, 1888; Rellerman, 1889). 

 Plate 17. Young plants distributed from Oregon by Howell 

 in 1885 may possibly belong here, possibly to salicifolius. 



6. R. HYMENOSEPALUS, Torr. One to three feet high, 

 from a cluster of deep-seated Dahlia-like tuberous roots, 

 subsimple, papillate to glabrous, often red ; leaves rather 

 succulent, more or less wavy margined, often 5x20 cm. 

 or larger, elliptical to oblanceolate, obtuse to very sharply 

 acuminate, the acute base decurrent on the short thick peti- 

 oles ; inflorescence ample, compound, with elongated sub- 

 erect branches; pedicels slender, about as long as the fruit, 

 less tumidly jointed below the middle ; valves flexible, ovate, 

 about 10x15 mm., obtuse to subacute, with an open sinus; 

 achene 3x5.3 mm. Bot. Mex. Bound. Surv. (1858), 177 ; 

 Watson, Bot. Calif, ii. 8, 479 ; Parry, Amer. Nat. ix. 350 ; 

 Greene, Am. Nat. xii. 175 ; Havard, Proc. Nat. Mus. 1885, 

 525 ; Vasey & Rose, Contr. Nat. Herb. i. 11 ; Brandegee, 

 PL from Baja, 204; Rusby, Drug. Bull. Nov. 1890. .ft. 

 Saxei, Kell. Pac.Rur. Press, 1879; JR. Arizonicus,Entt., 

 Trans. N. Y. Acad. v&?. (1888), 73. Dry soil in the 

 plains and lower mountains, California and Lower California 

 to Utah, the Indian Territory, and Texas. Specimens 



