404 CICHORIACEAE. 



4. ADOPOGON Necker. Goat's Beard. 



1. Adopogon virginicum (L.) Kuntze. {Krigia amplexicaulis 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. 



1. Cichorium Intybus L. On roadsides, fields and w«te 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. 



1. 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. x. L. grandiHora. 



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. rostrafa. 



I. 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. 



z. 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 cations 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. I^attlesnake-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 taU. 



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. glaiica. 



