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. 1. C. hirsutissima. 



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. S. 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. pedunculata. 



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. horrida. 



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. Aoribunda. 



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. 15. 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. Chiysopsis foliosa Nutt. In sandy soil from Minn, and Wash, to 

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

 North Cheyenne Caiion. 



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. imbricata 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. 



