144 RYDBERG: Rocky MOUNTAIN FLORA 
leaves, and is more related to the eastern P. virginiana. 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 
x2: Catt. Ber. 75. 1338. 
Ithink 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 Jetragono- 
fobus and other Old World genera. 
The Rocky Mountain species of Axzso/otus are : 
Anisolotus Wrightii (A. Gray) Rydb. 
Flosackia Wrightt A. Gray, Pl. Wright. 2: 42. 1853. 
Anisolotus brachycarpus (Benth.) Rydb. 
Flosackia brachycarpa Benth, Pl. Hartw. 306. 1848. 
Lotus huministratus Greene, Pittonia 2: 139. .1890. 
Anisolotus rigidus (Benth.) Rydb. 
FHlosackia rigida Benth. Pl. Hartw. 305. 1848. 
Aragallus Hallii (Bunge) Rydb. 
Oxytropis Halli Bunge, Mem. Acad. Sci. St. Petersb. VII. 22': 
i162; 1574, 
Vicia dissitifolia (Nutt.) Rydb. 
Lathyrus dissitifolius Nutt.; T. & G. Fl. N. Am. 1: 277. 1838. 
Lathyrus incanus (Rydb. & Smith) Rydb. 
Lathyrus ornatus incanus Rydb. & Smith, F]. Neb. 21: 64. 1895: 
Chamaesyce flabelliformis (Engelm.) Rydb. 
Euphorbia petaloidea flagelliformis Engelm. Bot. Mex. Bound. 
185. 1859. 
Euphorbia flagelliformis Engelm. Bull. Geol. Surv. Terr. 2: 243- 
1876. 
