434 BOTANICAL GAZETTE [JUNE 
this species under the name S. pyrifolia in the New Manual of Rocky Mountain 
Botany. This was due to a misinterpretation of ANDERSSON’S species. This 
species is found quite commonly in at least four states and sparingly in others, 
and is represented by fairly abundant herbarium material. It seems never to 
have been described previously, however, unless NuTTat’s rotundifolia is 
correctly interpreted as belonging here. Nelson’s 6101 from the Yellowstone 
Park comes the nearest of any of the specimens cited to matching NUTTALL’S 
description. 
S. monochroma is most closely related to S. mackenziana on the one hand, 
and to S. pseudomyrsinites on the other. From S. mackenziana it is separated 
by the very thin leaves, more ovate in outline and never even glaucescent, but 
separated by the much thinner and broader leaves, less glandular, and with 
much more slender veins. The pedicels also are shorter and usually glabrous. 
The following specimens are referred to this species. 
Wyominc.— Yellowstone National Park, E. A. Mearns 633, May 11, 1112, 
June 15,'1363, June 24, 1902 (N); in a ravine in the woods, Obsidian Creek, 
2-4 ft. high, Aven Nelson 6101, July 24, 1899 (B). 
Montana.—Livingston, E. W. Scheuber, June 1, 1901 (N). 
IpaHo.— No locality (probably Boise or northward), Coville and Kearney 
241 (N), 244, May 1899 (B, N); Cuddy Mountains, Washington County, alt. 
6000 ft., M. E. Jones 6547, July 11, 1899 (N); Nez Perces County, valley of 
Hatwai Creek, Sandberg, MacDougal, and Heller 39, April 24 (G, N, 935972; 
type, female; 242995, type, male), 70, April 28 (N); valley of Clearwater River 
(on island) 96, May 2 (F, G, N); valley of Peter Creek, 117, May 4 (FBb 2679, 
G, N); canyons, valley of Lake Waha, 215, May 21 (FBb 2828, G, N); along 
Hatwai or Peter Creeks, 1046, May 4, or 10, 1892 (N, 2 sheets); about Lewis- 
ton, A. A. and E. G. Heller 2942, April 23, 1896 (N); Latah County: L. F. 
Henderson 2880 (Wessels), 7894 (FBb); along Paradise Creek, near Moscow, 
Henderson 2882 (in part), June 2, 1894 (FBb); along the Potlatch River, near 
Juliaetta, Henderson 2883, April 21, 1894 (FBb). 
OrEGON.— Blue Mountains, oaks Union County: common g 
Union County, Cusick 875, 1880; alt. 8000 ft., Cusick 968 (in part), Soteohee 
1882 (N); Crane Prairie, South Blue Manitaine: Cusick 1652 (in part), June 17, 
1897 (N); stream banks, Cusick 1845, April 26, May 9, September 1898 (N); 
bank of Catherine Creek, alt. 3500 ft., Cusick 2383, May 30, June 28, 1900 
(F, G, N); Union, G. R. Hyslop 2058, July 18, 1916 (B); Wallowa County: 
along Chesnimnus Creek, Chico Station, Imnaha National Forest, alt. about 
tooo m., Coville 2328, May 27, 1907 (N); Headwaters of Mud Creek, alt. 
about 1350m., Coville 2390, June 8, 1907 (N); Umatilla County, ford of 
Umatilla Rives: South of Mission and 5 miles east of Pendleton, C. R R. Ball 
2089, August 20, 1917 (B); Grant County, Izee, Griffiths and Hunter 199, 
July 15, 1902 (B); Deschutes River, Thomas Howell, May 9, 1885 (FBb); 
Bend, on Deschutes River, E. Nelson, May 22, 1905 (B); Linn County, Fish 
