50 MINNESOTA STUDIES IN PLANT SCIENCE 



Distribution. — Montana, northern Idaho, and eastern Washington to Nevada. 

 Limits of the range not definitely known. 



Specimens examined : 



Washington: Spokane, alt, 1,200 ft., May, 1893, Sandherg and Leiberg (UMH) ; 

 Spokane, alt. 1,000-2,000 ft., May, 1893, Sandberg and Leiberg (UMH) ; Spokane, alt. 

 2,000-3,000 ft.. May, 1893, Sandberg and Leiberg (UMH, MBG 84123) ; Hangman 

 Creek, Spokane Coimty, alt. 1,510 ft.. May 16, 1893, Sandberg and Leiberg, No. 16 

 (MBG 84560) ; in pebbly moist hillsides, Pullman, May, 1897, A. D. E. Elmer, No. 126 

 (UMH, MBG 83874) ; on springy hillsides, Pullman, May 24, 1894, C. V. Piper, No. 

 1808 (UMH). 



Idaho: moist hillsides, Lewiston, April, 1892, /. H. Sandberg (UMH); Nez 

 Perces County, May, 1892, /. H. Sandberg (MBG 84422, UMH) ; meadows Kootenai 

 County, May, 1891, /. B. Leiberg, No. 81 (UMH) ; grassy slopes, upper ferry, Qear- 

 water River above Lewiston, April 30, 1892, Sandberg, MacDougal, and Heller, No. 

 73 (MBG 775340) ; about Lewiston, Nez Perces County, alt. 1,500-2,000 ft.. May 7, 

 1896. A. A. and E. G. Heller, No. 3037 (MBG 83886, UMH). 



Saxifraga oregana Howell, Erythea 3 :34. 1895. 

 Micranthes oregana (Howell) Small, N. Am. Fl. 22:2. 1905. 



This tall species differs from its allies by its very shallow receptacle, 

 elongated seeds, and long, narrow, oblanceolate leaves which are wholly 

 entire. The flattening of the receptacle by the subsequent growth and wide 

 divergence of the follicles produces a nearly hypogynous condition which 

 was clearly pointed out by Howell (17) as follows: "calyx attached to the 

 ovary at the very base." To this species Piper (21) referred Suksdorf's 

 No. 1729 and Henderson's No. 2488 both of which, in leaf characters differ 

 radically from Howell's specimens, although very similar as to inflorescence. 

 The receptacle also is deeper and broader than in Howell's plant, the petals 

 consistently narrower^ and the seeds narrower and more winged at the ends. 

 Small (27) attributed the elongated narrow leaves of Howell's plant to its 

 growing in water, but this hardly accounts for the differences in the recep- 

 tacle. The description of Micranthes oregana Howell in North American 

 Flora 22 :2 :138, 1905 is decidedly at variance with Howell's original descrip- 

 tion, from which it might be inferred that it was based not on Howell's 

 specimens, but on Suksdorf's No. 1729, a plant referred to S. oregana 

 Howell by Piper (Plate XHI). 



Distribution. — Known only from the type locality. 



Specimens examined : 



Oregon: Lake Labish near Salem, June 21, 1893, Thos. Howell, No. 1498, ex 

 herbarium, /. W. Congdon (UMH, MBG 84460). 



Saxifraga parvifolia Greene, Pitt. 3:116. 1896-1898. 

 Micranthes parvifolia (Greene) Small, N. Am. Fl. 22:2:141. 1905. 



