CICHORIACEAE. 405 



Involucres and peduncles hirsute or glandular or both. 

 Leaf-blades oblanceolate or oblong to linear-oblanceolate. 



Leaves long-petioled ; petioles one-half as long to fully as long as the 

 blades, not winged. 

 Blades of the basal leaves broadly oblanceolate ; stem usually with 1-2 



leaves ; involucres over i cm. high. 3. C. petiolata. 



Blades of the basal leaves narrowly linear-lanceolate or linear-oblan- 

 ceolate ; stem scapiform ; involucres less than i cm. high. 



4. C. glaucella. 

 Leaves subsessile or with short, winged petioles. 



Leaves glabtous ; involucres with a few short hairs. 



5. C. perplexa. 

 Leaves and involticres hairy. 6. C runcinata. 



Leaf-blades obovate ; involucres and peduncles densely glandular hispid 

 with long hairs. 

 Involucres over i cm. high; leaves hairy, 1.5-2 dm. long. 



7. C. riparia. 

 Involucres i cm. high or less ; leaves glabrous or nearly so. 



8. C. denticnlata. 

 Plant more or less canescent or furfurascent, especially the leaves. 



Involucres glabrous, 5-7-flowered. 9. C. acuminata. 



Involucres canescent. 



Involucres and peduncles without black hairs. 



Principal bracts of the involucres 5-8 ; flowers of the same number. 

 Blade proper broadly lanceolate ; lobes usually directed downward. 



10. C. intermedia. 

 Blade proper narrowly lanceolate to almost linear ; lobes curved up- 

 wards. II. C. angiistata. 

 Principal bracts of the involucres 9-14; flowers 10-20; plant low. 



12. C. pumila. 

 Involucres and peduncles with some black hairs intermixed with the to- 

 mentum ; principal bracts 9-10. 

 Hairs glandular. 13. C. occidentalis. 



Hairs not glandular. 14. C. scopulorum. 



Achenes with a more or less dilated disk bearing the deciduous pappus ; plant 

 dwarf, less than i dm. high. 15. C. nana. 



I. Crepis tomentulosa Rydb. In the mountains near Pike's Peak, Colo. — 

 Alt. nearly 10,000 ft. — Ruxton Dell. 



i!. Crepis glauca (Nutt.) T. & G. (C. lancifolia Greene ?) In valleys from 

 Mont, to Colo, and Nev. — Alt. 4500-10,000 ft. — Clear Creek, below George- 

 town ; Ft. Collins ; Doyle's ; Garland ; Wahatoya Creek ; Eagle River. 



3. Crepis petiolata Rydb. In the mountains of Wyo. and Colo. — Alt. 7000- 

 9000 ft. — Along Bear River, five miles east of Hayden; Georgetown. 



4. Crepis glaucella Rydb. In wet meadows from Mont, to Colo. — Alt. about 

 7500 ft. — Wahatoya Cre'ek. 



5. Crepis perplexa Rydb. In valleys from N. D. and Alb. to Neb. and Colo. 

 — Alt. 5000-gooo ft. — Sterling, Logan Co. ; Garland ; Parlin ; Sangre de Cristo 

 Creek ; South Park ; Pagosa Springs ; Empire ; Bosworth's range ; La Porte ; 

 Georgetown; Moon's ranch; Table Rock; Beaver Creek; Tobe Miller's ranch; 

 Walden. 



6. Crepis runcinata T. & G. In valleys from N. D. and Alb. to Colo. — 

 Westcliffe. 



7. Crepis riparia A. Nels. On river banks of Neb. and Colo, and Utah. — 

 Yampa; Steamboat Springs. 



8. Crepis denticulata Rydb. In the mountains qf Colo., Wyo. and Utah. — 

 Near Lake John, North Park. 



