68 MONTANA AGRICULTURAL COLLEGE SCIENCE STUDIES. 



Greene. It differs from 3\ Calif oniica, Greene (Pittonia. 1 1286) i 

 its usually smaller size and flowers, its glabrous leaves and cymose, 

 instead of racemose, inflorescence. From ,S\ refle.ra, HOOK., with 

 which it is usually confused, it is separated by its purple-glandular 

 (not hoary) pubescence and pure white, instead of orange-spotted 

 petals. The reflexed sepals, glandular (not viscid) pubescence and 

 peduncled flowers at once distinguish it from 3\ Virginiensis, Michx. 

 Upper Sand Coulee, May 30, 1888, R. S. Williams, 700; Missoula, 

 4500 ft., June 7, 1897, M. J. Elrod ; Bozeman, May 30, 1901, W. W. 

 Jones; Spanish Creek, 1901, Jacob Vogel ; Alt. Hyalite, 10,000 ft., 

 Aug. I, 1902; Sperry Glacier, 6-8000 ft., Sept. I, 1902, in the latter 

 situation growing with S. Notkana, Aloe. 



Saxifraga Sierrae, Small, Bull. Torr. Bot. Club, 23:36^; Coville, 

 Proc. Biol. Soc. Wash. 7 178. Like 6\ rhomboidca, Greene, but the 

 calyx-tube is shorter, petals equaling the calyx-lobes and the leaves 

 are wider. From 6\ Columbiana, Piper, it is distinguished by its 

 sepals often erect in anthesis, calyx-tube more adherent below, pe- 

 tals wider, leaves wider and abrupt at base and inflorescence long, 

 branching and divergent below. 



Bridger Canyon, Bozeman, May 16, 1898, Airs. R. M. Wilcox; 

 Sedan, June n, 1901, B. Jones. 



Saxifraga Oregana, Howell, Erythea, 3:34. Related to the 

 last but much larger (6-i2dm.) with long (3-2ocm.), lanceolate to 

 oblong, nearly entirejeaves and petals twice the length of the calyx- 

 lobes. Missoula, Alay n, 1897, M. J. Elrod, 54. 



Saxifraga reflexa, Rydberg, Flora, 193, is S. Marshall!^ Greene,, 

 though none examined have the orange-spotted -petals mentioned by 

 him. 



Saxifraga rhomboidea, Greene, Pittonia, 3 :343 ; 5. reflcxa, 

 Small, Bull. Torr. Bot. Club, 23:367. One of the segregates f 

 6\ nivalis, characterized by its larger size (2-5 dm. high), stems 

 densely glandular puberulent or somewhat viscid-pubescent, long- 

 turbinate calyx-tube, large (4 nun. long), conspicuous white petals, 

 twice as long as the lobes of the calyx, and flowers in glomerate 

 cymes. Common in the lower mountains of the state. 



Bozeman, Alay 26, 1901 ; Canyon of the Gallatin, July 5, 1898; 

 Spanish Creek, Alay 30, 1901, Jacob Vogel; Alt. Hyalite, Aug. I. 

 1902; Bozeman, May 26, 1901; Canyon of the Gallatin, July 5, il 



