144 Rydberg : Rocky Mountain flora 



leaves, and is more related to the eastern P. virginiaua. P. melano- 

 carpa is rather nearer the Mexican species known as P. Copalin, 

 and it is sometimes very hard to distinguish it from that species. 



ANISOLOTUS Bernh. Sem. Hort. Erf. 1837. — Linnaea 



12 : Litt. Ber. 75. 1838. 



I think that this genus, well characterized by Bernhardi, should 

 be restored. It is well distinct from the Old World Lotus and 

 from Hosackia. I think that Dr. Greene's merging all our North 

 American species usually known as Hosackia into Lotus was very 

 unfortunate, for we do not have any native species which could be 

 included in Lotus, even if made broad enough to include Tetragono- 



lobus and other Old World genera. 



The Rocky Mountain species of Anisolotus are : 



y Anisolotus Wrightii (A. Gray) Rydb. 

 Hosackia Wrightii A. Gray, PL Wright. 2 : 42. 1853 



Anisolotus brachycarpus (Benth.) Rydb. 



Hosackia brachy 'car pa Benth. PI. Hartw. 306, 1848. 

 Lotus huministratus Greene, Pittonia 2 : 139. 1890. 



4 Anisolotus rigidus (Benth.) Rydb. 

 Hosackia rigid a Benth. PI. Hartw. 305. 1848. 



J 



Aragallus Hallii (Bunge) Rydb. 



Oxytropis Hallii Bunge, Mem. Acad. Sci. St. Petersb. VII. 22 1 

 162. 1874. 



y Vicia dissitifolia (Nutt.) Rydb. 



Lathy rus dissitifolius Nutt.; T. & G. Fl. N. Am. 1 : 277. 1838 



VLathyrus incanus (Rydb. & Smith) Rydb. 

 Lathyrus ornatus incanus Rydb. & Smith, Fl. Neb. 21 : 64. 1895. 



Chamaesyce flabelliformis (Engelm.) Rydb. 



Euphorbia petaloidea flagclliforniis Engelm. Bot. Mex. Bound. 



185. 1859. - 



Euphorbia flagellifonnis Engelm. Bull. Geol. Surv. Terr. 2 : 243. 



1876. 



