144 Rydberg : Rocky Mountain flora 



leaves, and is more related to the eastern P. virginiaiia. P. inelaiw- 

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

 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- 

 lobns and other Old World genera. 



The Rocky Mountain species of Anisolotus are : 



Anisolotus Wrightii (A. Gray) Rydb. 

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



Anisolotus brachycarpus (Benth.) Rydb. 

 Hosackia bi'ac/iycarpa^Qnth.Vl. Hartw. 306. 1848. 

 Lotus Jmnwiistratiis Greene, Pittonia 2 : 139. 1890. 



Anisolotus rigidus (Benth.) Rydb. 

 Hosackia rigida Benth. PI. Hartw. 305. 1848. 



Aragallus Hallii (Bunge) Rydb. 

 Oxytropis Hallii Bunge, Mem. Acad. Sci. St. Petensb. VII. 22' : 

 162. 1874. 



Vicia dissitifolia (Nutt.) Rydb. 

 Lathynis dissitifoliiis Nutt.; T. & G. Fl. N. Am. i : 277. 1838. 



Lathyrus incanus (Rydb. & Smith) Rydb. 

 Lathynis ornatiis incanus Rydb. & Smith, Fl. Neb. 21 : 64. 1895. 



Chamaesyce flabelliformis (Engelm.) Rydb. 

 Euphorbia pctaloidea jlagclliforniis P^ngelm. Bot. Mex. Bound. 



185. 1859. 

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



1876. 



