Rydberg : Rocky Mountain flora 131 



This species resembles Chrysothamnus graveolens in habit, but 

 the leaves are broader, more tomentulose ; the bracts are slightly 

 tomentulose, erose-ciliate, and broader than in that species. Ward's 

 specimens were determined by Dr. Gray as Bigclovia graveolens 

 latisquamea and included therein in the Synoptical Flora ; but it 

 is wholly distinct therefrom. The true C. latisquamea (A. Gray) 

 Greene has very white filiform-revolute leaves and the bracts more 

 rounded at the apex. 



Utah : Strawberry Valley, Sept. 3, 1883, F. E. Leonard 288 

 (type, in herb. N. Y. Bot. Gard.) ; Twelve-mile-Creek, Aug. 29, 

 1875, L. F. Ward 659. 



Chrysothamnus stenolepis sp. nov. 



Low shrub, 2-3 dm. high, somewhat spinescent ; branches 

 short, erect, glabrous or finely puberulent above ; leaves narrowly 

 lance-linear, 1-2 cm. long, 2-4 mm. wide, glabrous, scabrous- 

 ciliate on the margins, convolute and somewhat twisted ; inflores- 

 cence corymbiform, of few heads ; involucres about 8 mm. long ; 

 bracts 4-ranked in 3 series, narrowly lanceolate, or the inner linear, 

 acute, glabrous, keeled, somewhat viscid ; corollas scarcely ex- 

 ceeding the involucre ; lobes lanceolate, 2 mm. long ; achenes 

 hirsute-strigose. 



This species is related to Chrysothamnus viscidiflonis and C. 

 glaucus, but differs from both in the very narrow acute bracts. 



Montana: Pass Creek, near Bridger Pass, H. Engelmann (type, 

 in herb. Columbia Univ.). 



Utah : Saleratus River, Aug. 1889, C. K. Dodge. 



Chrysothamnus marianus sp. nov. 



Undershrub, 1-2 dm. high, with a woody thick caudex ; 

 branches erect, at first green, soon straw-colored or white, densely 

 and finely puberulent ; leaves linear or the lower linear-oblanceo- 

 late, acute, thick, densely puberulent, 1-2 cm. long, I— 1 5 mm. 

 wide, 1 -nerved, somewhat twisted ; heads narrow, in small, corym- 

 biform-cymose panicles, involucres about 5 mm. high ; bracts 

 yellowish, glutinous, erose-ciliate on the margins, 4-ranked and in 

 about 3 series, the outer ovate, acutish, the inner spatulate-oblong, 

 rounded at the apex ; achenes sparingly strigose ; corollas scarcely 

 exceeding the involucres. 



This species has many characters of Chrysothamnus puberidus, 



