CARDUACEAE. 339 



10. Grindelia fastigiata Greene. On dry hills of western Colo. — Alt. about 

 4600 ft. — Grand Junction. 



11. Grindelia aphanactis Rydb. In sandy soil in southwestern Colo. — 

 Durango. 



8. CHRYSOPSIS Nutt. Golden Aster. 



Leaves at least when young appressed canescent. 



Stem-leaves, except the lower ones sessile or nearly so. 



Stem-leaves oblong to lanceolate, decidedly acute. i. C. hirsntissiiiia. 



Stem-leaves obovate or obovate-lanceolate, mostly obtuse and mucronate or 

 more seldom acutish. 

 Leaves usually less than 3 cm. long; those of the branches short, 1-1.5 

 cm. long ; heads small ; involucres seldom i cm. broad, usually sub- 

 tended by leaves. 2. C. foliosa. 

 Leaves 3-6 cm. long ; those of the branches not reduced ; heads larger ; 

 involucres over i cm. broad. 

 Inner bracts with subulate usually brownish and spreading tips ; heads 



sessile. 3. C. caudata. 



Inner bracts merely acute. 



Heads peduncled, naked or subtended by 1-2 small linear or oblong 

 leaves ; leaves neither cordate nor truncate at the base. 



4. C. villosa. 

 Heads sessile, subtended by ample oval leaves ; upper stem-leaves 

 cordate or truncate at the base. 5- C. amplifolia. 



Leaves all except the uppermost petioled, oblanceolate, obtuse or acutish. 

 Heads short-peduncled or sessile. 



Stem 3-5 dm. high ; heads peduncled. 6. C. Bakeri. 



Stems low, scarcely over i dm. high ; heads sessile. 7. C. alpicola. 

 Heads long-peduncled ; peduncles 3-7 cm. long. 8. C. pedunculafa. 



Leaves hispid or hirsute with a spreading pubescence. 

 Leaves copiously hairy, only slightly viscid. 



Leaves obovate, broadly oblanceolate or rarely oblong, subsessile except the 



lower: pubescence short. 9- C. horrid a. 



Leaves oblanceolate, all except the uppermost distinctly petioled. 

 Plant tall. 3-4 dm. high ; heads more or less peduncled. 

 Plant densely cespitose ; but stems simple to near the top. 



10. C. arida. 

 Plant profusely branched. 11. C Horibunda. 



Plant low, 1-2 dm. high; heads sessile. 12. C. pumila. 



Leaves sparingly hairy, decidedly viscid. 



Upper leaves obovate, sessile, obtuse ; lower oblanceolate, petioled. 

 Involucres over i cm. broad, subtended with obovate or oblong leaves. 



13. C. resinolens. 

 Involucres less than i cm. broad, naked or subtended by small linear leaves. 



14. C. viscida. 

 Leaves all oblanceolate, acute. i5- C. hispida. 



1. Chrysopsis hirsutissima Greene. In sandy soil from Sask. and N. D. to 

 Colo, and Ariz.— Alt. 7000-9000 ft. — Arboles ; Veta Pass; Mancos. 



2. Chrysopsis foliosa Nutt. In sandy soil from Minn, and Wash, to 

 Kans. and Colo.— Cheyenne Mountain; Red Rock Canon; Spring Caiion; 

 North Cheyenne Cafion. 



3. Chrysopsis caudata Rydb. On hills and mountains of Colorado. — Alt. 

 5000-10,000 ft. — Ruxton Dell ; near Boulder. 



4. Chrysopsis villosa (Pursh) Nutt. (C. imhricata A. Nels. ?) On dry 

 hills from Minn, and Ida. to Tex. and N. M.— Alt. 4000-10,000 ft.— Mt. Har- 

 vard ; Tennessee Pass, Lake Co. ; Trail Glen ; Chambers' Lake ; New Wind- 

 sor; mountains, Larimer Co.; Pike's Peak; Clear Creek; Middle Park; 

 Steamboat Springs. 



