246 



inaeus, neither does Brown's description, especially that of the 

 flower, agree with that species. Flodman, no. 469. 



Ranunculus Suksdorfii Gray, Proc. Am. Acad. 7,1: 371. 



The range of this species is much extended eastward by its 

 discovery on the Spanish Peaks at an altitude of 8000 ft., July 14, 

 1896, Flodman, no. 471. 



Ranunculus subaffinis (Gray). 



R. Arizonicus subaffinis Gray, Proc. Am. Acad. 21: 370. 1886. 



R. subsagittatus subaffinis Greene, Pittonia, 2 : no 1890. 



The author agrees fully with Prof. Greene that both the varie- 

 ties of R. Arizonicus ought to be removed from that species, but is 

 inclined to believe that subaffinis is specifically distinct from 

 subsagittatus. I have seen Prof. Greene's specimens from the San 

 Francisco Mountains, as well as others collected by Dr. Mearns and 

 by Mr. Wooton in the same region ; Flodman's no. 472, from the 

 Bridger Mountains, July 28, 1 896, agrees in every respect with them. 



Cardamine unijuga n. sp. 



Stem from a very slender rootstock, slender, glabrous, simple, 

 strict, 2-3 dm. high ; basal leaves simple, about 3^ cm. in diame- 

 ter, broadly cordate or reniform in outline, round-sinuately 3- 

 lobed ; lower stem leaves with a pair of oblong leaflets below the 

 terminal one, which resembles the basal leaves or is a little more 

 rhomboid in outline ; upper leaves similar but with all the leaflets 

 oblong; raceme slender and narrow; flowers about 2 mm. in 

 length, white ; sepals ovate, obtuse ; fruiting pedicels about i dm. 

 long, nearly erect; silique erect, 15-18 mm. long and about i mm. 

 wide, with a short thick style and 8-12 seeds. (^Plate 304.) 



The inflorescence and the silique much resemble those of C. 

 oligospernia, but the plant is more slender and simple and the 

 leaves in all specimens seen have only one pair of leaflets and the 

 basal ones are simple, while in C. oligospernia the basal and lower 

 stem leaves have 3-5 pairs. Spanish Basin, July 18, 1896, Flod- 

 man, no. 494. 



Cardamine Leibergii Holz. Cont. U. S. Nat. Herb. 3: 212. 1895. 



This species was rediscovered by myself in 1895, but only a 

 few specimens were preserved. It was growing in canons at two 



