48 Rydberg : Rocky Mountain flora 



at the apex, thick, sparingly strigose, soon glabrate, 5— lO mm. 

 long ; peduncles 4—7 cm. long ; raceme short, 1—2 cm. long, in 

 fruit 3-6 cm. long, 5— 15-flowered ; calyx black-hairy ; tube 2-2.5 

 mm. long; teeth subulate, 1—2 mm. long; corolla ochroleucous ; 

 banner ^—j mm. long ; wings and keel 5 mm. long ; pod scarcely 

 stipitate, about 2 cm. long, 4 mm. broad, oblong, tapering at both 

 ends, slightly arcuate, sulcate on the lower suture except at the 

 ends, acute on the upper suture, mottled with purplish-brown and 

 minutely strigose. 



This is perhaps most nearly related to T. sparsiflonnn (A. 

 Gray) Rydb., but is a much larger and coarser plant. The latter 

 species has usually smaller leaves, smaller corolla, white and 

 tinged with violet, strongly oblique calyx and pods of about half 

 the length, more curved and more distinctly stipitate. 



Colorado: Platte Caiion, May 19, 1894, State Agricultural 

 college, Colorado, distribution no. /j (type in herb. N. Y. Bot. 

 Garden). 



Hamosa atratiformis 



Perennial ; stem 2-3 dm. high, erect, branched, strigose ; stip- 

 ules triangular, strigose, 1—2 mm. long ; leaves 3—5 cm. long ; 

 leaflets 13-19, oblong, strigose below, glabrous above, 4—6 mm. 

 long; peduncles 5-7 cm. long: raceme lax, 2-3 cm. long; calyx 

 black-strigose ; tube about 2 mm. long ; teeth subulate, i mm. 

 long ; corolla ochroleucous, about 7 mm. long ; pod linear, 

 straight, minutely strigillose. 



This is closely related to H. atrata {Astragalus atratns S. Wats. 

 Bot. King P^xp. 69. 1 871), but differs in the short leaves and the 

 smaller flowers, which are scared}^ more than half as long as in 

 that species. 



Southern Utah: 1874, C. C. Parry ^7 (type in herb. Co- 

 lumbia Univ.). 



Xylophacos aragalloides 



Cespitose perennial ; stems i dm. or less long, decumbent at 

 the base, densely white-strigose ; stipules scarious, strigose, trian- 

 gular, with a subulate acumination, 5—8 mm. long; leaves 10—15 

 cm. long; leaflets 11— 19, lanceolate to elliptic, silky-canescent, 

 5—12 mm. long, acute; peduncles about i dm. long; raceme 

 short, 4-10-flowered ; calyx ascending, strigose with black and 

 white hairs ; tube cylindric, about 8 mm. long ; teeth subulate, 

 3-4 nmi. long ; corolla purplish, about 2 cm. long; legume lunate, 

 about 4 cm. long, tapering at both ends, rather deeply sulcate be- 



