Contributions to Western Botany. IB 



'locality of Nuttall it is certain that A. cicadae is only a variety 

 of it as had long been suspected. 



Astragalus diversifolius Gray P. A. A. vi 230. Having 

 recently collected the typical form in abundant material it is the 

 writer's opinion that it can be maintained as sufficiently distinct 

 from A. junceus Gray to warrant the latter being placed under 

 it as a variety, namely Astragalus diversifolius var. junceus 

 (Nutt.) (Homalobus junceus Nutt T. & G. Fl. i 351) There is 

 no reason why Astragalus junceus should not stand as an unoc- 

 cupied name for the A. junceus of Ledebour is a synonym of A. 

 Stevenianus DC. 



Astragalus sericoleucus Gray var. aretioides. Plants 

 densely congested, peduncles almost none; flowers peeping out 

 from the edge of the stipules; leaves very short and sessile; pod 

 hoary and leaflets usually acute. H. Engelmann, Simpson's 

 Exp. Aug. 19, 1858, mountains near Sweetwater river, Wyo. 

 This is the type. Other specimens are in Nuttall's collection in 

 Herb. Phil. Acad, on the same corner of the sheet as is the type 

 of his Phaca sericea and confused with that species by Nuttall 

 and all who have followed him. Nuttall's description however 

 belongs with the other specimen. Hayden "Gravelly hills, Wind 

 river Valley, Wyo. 5500 feet alt., abundant, May 18, i860." 

 This has obtuse and often obovate leaflets. A specimen of A. 

 Nelson from Wyoming has obtuse leaflets and very small flowers. 

 This does not differ from Collin's specimen of A. tridactylicus 

 from Colorado except in the hoary pod. The typical form of A. 

 tridactylicus Gray has long petioles and rather large flowers, but 

 many specimens have almost no petioles and smaller flowers, 

 the glabrous pod being the only separating character. 



Astragalus Chamaleuce var. laccoliticus {A. cicadae var. 

 laccoliticus Jones Cont. vii 672.) This has the pod of A. Musin- 

 iensis and pointed leaflets. It will probably prove to be a good 

 species when studied more in the field, and may then bear the 

 name A. laccoliticus. 



Astragalus gracilentus var. Hallii. (Gray.) A. Hallii 

 Gray P. A. A. vi 224.) 



