492 



Astragalus adsurgeiis Pall. Astrag. 10, t. 31 (1800^ ; Antratjalus laxmanni Pall. (?), 

 Niitt. A. authorji, uot Jacq. Lately the uaiiie J. laxmanni Jacij.,' Las lieeu adopted 

 lor our Ameriiaii j)lant. Although there is uothiug in the original description that 

 really disagrees with our plant, yet the plate accompanying it shows that Jacquiu's 

 A. humanni was of a diHereut habit. The stem is very slender and decumbeut, the 

 leallets narrower and smaller, the heads, or rather spikes, much longer and narrower. 

 The pods .seem to be like those of -/. adsiinjenn, but are more truncate at the aj)ex and 

 have the style abriii)tly turned dorsally, making a right angle witli the jiod.- In 

 .1. adaunjenatho: pod acuminates into a nearly central style, which is somewhat twisted 

 and curved dorsally, but does not make a right angle. In the Ccdumbia College 

 Herbarium there is a specimen of A. laxmanni collected by A. Kegel in Turkestan, 

 which perfectly agrees with the figure in llortus Viudobonensis. The Mowers of this, 

 although of about the length of those of .1. adaunjens, are much narrower, the calyx 

 less than one-half the length of the claws of the petals, or with the teeth about two- 

 thirds their length, while in A. adaurgcns the calyx with the teeth nearly ecjuals the 

 claws. 



Common in the region. Some specimens from Hot Springs have a more decumbent 

 stem and brighter blue llowers. Hot Spring.-), altitude 1,100 m., June 8; Hermosa, 

 altitude 1,050 m., June 22; Custer, altitude 1,700 m., July 15 (Xo. 617). 



Astragalus hypoglottis L. Mant. ii, 271 (1771). 



Not uncommon among the foothills: Hot Springs, altitude 1,100 m., .Mine 14; Her- 

 mosa, altitude 1,050 m., .June 22 (No. 618). 



Astragalus drummondii Dougl. ; Hook. Fl. Bor. Amer. i, 153 (1834). 



Hills near Hot Springs, altitude 1,100 m., Juno 18 (No. 619). 



Astragalus racemosus Pursh, Fl. ii, 740 (1814). 



The corolla is ochrolcucous rather than white, and the angles of the i>od8 are 

 blunter than in Nebraska specimens collected in 1801. Near Fall Kiver Falls, alti- 

 tude 1,000 m., June 17 (No. 620). 



Astragalus gracilis Nutt. Gen. ii, 100 (1818). 



Hot Springs, altitude 1,100 m., June 15 (No. 573). 



Astragalus microlobus Gray, Proc. Amer. Acad, vi, 203 (1864). 



Hot Springs, altitude 1,100 m., June 15 (No. 621). 



Astragalus aboriginum Richards. Bot. App. 746 (1823). 



The fruit is membranaceous, long-stipitate, strictly l-celled, but the dors;d suture 

 a little indexed, straight, the ventral one curved. It was collected in fruit only, 

 north of Deadwood. altitude l.ijOO m., July 5 (No. 622). 



Astragalus aborigimun glabriusculus (Hook.); Phaca (jUihriuacHla Hook. Fl. 

 Bor. Amer. i, 144 (1830). 



This has generally been regarded as a distinct species, but even Hooker says, in 

 the original description, that it may be a variety of the preceding. The only dif- 

 ference I can find is that the plant is smootlier and the pod a little more curved. 

 The flowers are ochroleucous, the keel tipped with purple. Custer, altitude 1,700 ui., 

 June 1; Kochford, altitude 1,700 m., July 12; Limestone District, altitude 2,000 m., 

 July 26 (No. 623). 



Astragalus alpinus L. Sp. PI. ii, 760 (1753). 



'Hort. Vind. iii,22 (1776). 



-There 18 a species fnmi Japan, much larger but with the same pod characters, in 

 the National Herbarium. This was identified by Bunge, the well-known authority 

 on Old World Astragali, as A. adaurf/cna, but is evnlently distinct. It clitlers in the 

 style, and in its more slender, less distinctly striate stem, its looser heads on peduncles 

 which are neither strict nor longer than the leaves. Notwithstanding Bunge's deter- 

 mination the ]>lant can not be A. adaurgena, this name belonging to our species, as is 

 plainly shown by the original plates. 



