VOL. III.] Contributions to Western Botany. 289 



the type in the purple flowers, keel ^ broader, longer pod, which 

 is cartilaginous and so thicker, pulpy pod, while the type has a thin 

 and almost transparent pod, without pulp when young. If this 

 latter point holds good in all cases, it is a good species. It is at 

 once distinguishable from the type everywhere, and never has been 

 found east ol the Deep Creek Mountains in the western edge of 

 Utah. 



^ Astragalus Canadensis L. and A. Mortoni Nutt. have the 

 following characters in common: Flowers in dense spikes, horizontal; 

 calyx white, flattened, somewhat gibbous, hairy, tips broadly trian- 

 gular and tufted with hairs, short; banner arched in a wide arc, 

 sides reflexed, at tip the most, very little elsewhere; sulcus trian- 

 gular and acute at tip of banner, rounded at base of banner; banner 

 equaling the keel, ochroleucous; wings ascending and narrow, ex- 

 posing both the tip and base of keel, obtuse, a line longer than keel. 



Astragalus Canadensis has calyx decidedly notched on the 

 upper side; bracts subu'ate, short; wings linear but slightly wider 

 at blunt tip; keel little incurved; leaves in about 13 pairs and in- 

 clined to be lanceolate; spikes not denser fruited than in the other 

 species. The keels of both species are veined. 



Astragalus Mortoni Nutt. Calyx teeth not unequal; wings 

 oblong-lanceolate, lyi lines wide at base; keel purple tipped, arched 

 to yi of a circle; bracts ovate to lanceolate, 1 to 2 lines long; leaves 

 inclined to be oblong and much smaller than in Canadensis; flowers 

 in a closer and shorter head. Pods pubescent and densely aggre- 

 gated, ascending as in the other species. 



A. Canade?isis was just coming into bloom at Grinnell, Iowa, on 

 August 16, 1892, at 1,000 feet altitude, while ^. M?r/^«z was well in 

 bloom at Muncy, Eastern Nevada, on July 6, 1891, at 6,000 feet 

 altitude. 



t^ Astragalus Dodgianus, n. sp. Many stemmed from a woody 

 root; stems very slender, flexuous, branching from the base, 6 to 

 24 inches long; stipules sheathing at the base, membranous and 

 barely pointed, upper ones connate at base and very broadly trian- 

 gular; whole plant except the glabrous pods minutely and sparsely 

 pubescent; leaves i to 2 inches, with proper petiole j^ an inch; 

 rachis leaf-hke; leaflets 4 to. 5 pairs, narrowly elliptical to linear, 2 



