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 glabrous ; involucres with a few short hairs. 



5. C. perplex a. 

 Leaves and involucres 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. denticulata. 

 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, n. C. angustata. 

 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. 



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

 Alt. nearly 10,000 ft. Ruxton Dell. 



2. 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 Creek. 



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

 Alt. 5000-9000 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 of Colo., Wyo. and Utah. 

 Near Lake John, North Park. 



