404 CICHORIACEAE. 



4. ADOPOGON Necker. GOAT'S BEARD. 



i. Adopogon virginicum (L.) Kuntze. (Krigia ample xicaulis Nutt.) In 

 moist woods and meadows from Ont. and Man. to Ga. and Colo. Alt. 6000- 

 8500 ft. Colorado Springs; mouth of Cheyenne Canon; near Pike's Peak; 

 North Cottonwood Creek. 



5. CICHORIUM L. CHICKORY. 



i. Cichorium Intybus L. On roadsides, fields and waste places from N. S. 

 and Minn, to N. C. and Colo. Naturalized from Europe. Alt. about 5000 

 ft. Ft. Collins; La Porte, Larimer Co.; Denver. 



6. MALACOTHRIX DC. 



i. Malacothrix sonchioides T. & G. On plains from Neb. and Nev. to Kans. 

 and Calif. Alt. 4500-8000 ft. Grand Junction; McCoy's, Eagle Co. 



7. LYGODESMIA D. Don. 



Perennials. 



Involucres 15-25 mm. high, 6-io-flowered. i. L. grandiflora. 



Involucres about 10 mm. high, usually 5 -flowered ; upper leaves reduced. 



2. L. juncea. 

 Annuals; leaves narrowly linear; involucres 10-15 mm. high. 3. L. rostrata. 



1. Lygodesmia grandiflora T. & G. On gravelly hills from Wyo. and Ida. 

 to Colo, and Ariz. Alt. up to 7000 ft. Mancos; Glenwood Springs; Hotch- 

 kiss ; Grand Junction ; Gypsum, Eagle Co. 



2. Lygodesmia juncea (Pursh) D. Don. On prairies and plains from Minn., 

 Sask. and Alb. to Mo. and N. M. Alt. 4000-12,000 ft. Gunnison; New 

 Windsor ; Ft. Collins ; Denver ; Pueblo ; West Spanish Peak ; Pagosa Springs ; 

 Table Rock; Fossil Creek; Manitou; Colorado Springs. 



3. Lygodesmia rostrata A. Gray. In canons and on sandy plains from S. D. 

 and Sask. to Kans. and Colo. New Windsor; Greeley. 



8. PRENANTHELLA Rydb. 



i. Prenanthella exigua (A. Gray) Rydb. (Lygodesmia exigua A. Gray) 

 On stony hills from Colo, and Utah to Tex. and Ariz. Grand Junction. 



9. NABALUS Cass. RATTLESNAKE-ROOT. 



i. Nabalus racemosus (Michx.) DC. (Prenanthes racemosa Michx.) In 

 moist ground from N. B. and Sask. to N. J. and Colo. Alt. 5000-9500 ft. 

 Westcliffe ; Estes Park, Larimer Co. ; Cabin Canon, near Pike's Peak. 



10. CREPIS L. HAWK'S-BEARD. 



Achenes not discoid-dilated at the insertion of the pappus ; plants tall. 



Plants neither canescent nor furfurascent ; heads hemispherical to turbinate. 

 Involucres glabrous or tomentulose when young ; neither hirsute nor glandular. 

 Involucres and peduncles tomentulose, at least when young. 



1. O. tomentulosa. 

 Involucres glabrous or slightly puberulent when young. 



2. C, glauca. 



