CICHORIACEAE. 407 



13. AGOSERIS Raf. 



Beak short, scarcely more than half as long as the body of the achenes, striate 

 throughout. 

 Leaves decidedly pubescent, even in age. 



Outer bracts lanceolate, obtuse. i. A. pubescens. 



Outer bracts ovate or ovate-lanceolate, acuminate. ^. A. maculata. 



Leaves in age glabrate and glaucous. 



Bracts villous-ciliate, at least on the margins. 



Inner bracts long-acuminate ; plant less than 2 dm. high. 



• 3. A. attenuata. 



Inner bracts merely acute. 



Leaves obtuse or acute, entire or rarely toothed. 



Outer bracts much broader than the inner, often obtusish ; plant gen- 

 erally low and leaves short, obtuse. 4. A. pumila. 

 Outer bracts usually not much broader than the inner ; plant 3-5 dm. 

 high ; leaves long and acute. 5. A. scorzoneraefolia. 

 Leaves acuminate, more or less pinnatifid, lobed or toothed. 

 Leaves deeply pinnatifid ; flowers turning purplish. 



6. A. agrestis. 

 Leaves less deeply pinnatifid ; flowers not turning purple. 



7. A. Leontodon. 

 Bracts glabrous ; involucres if at all hairy, only tomentose at the very base. 



Leaves entire or toothed. 



Outer bracts oval or ovate, obtusish ; leaves 2-3 dm. long, oblanceolate ; 



flowers rose-color. 8. A. roseata. 



Bracts all linear-lanceolate, acute or acuminate ; flowers yellow. 

 Leaves linear-oblanceolate. 9. A. glauca. 



Leaves narrowly linear. 10. A. parviAora. 



Leaves pinnatifid with narrow lobes ; flowers yellow, turning purple. 

 Bracts with loose spreading tips ; heads broadly campanulate. 



11. A. rosea. 

 Bracts appressed; heads more or less turbinate. 12. A. laciniata. 

 Beak long, about as long as or longer than the body of the achene, scarcely 

 striate at the middle. 

 Bracts all broad, ovate to ellipitical, abruptly acuminate. 



13. A. montana. 

 Bracts, at least the inner ones, linear or linear-lanceolate, acute. 



Involucres more or less regularly imbricated ; beak about equalling the body 

 of the achenes. 

 Leaves densely pubescent. 



Plant low; flowers purple. 14. A. arachnoidea. 



Plant tall; flowers yellow. IS- ^- elata. 



Leaves glabrous or nearly so. 



Flowers reddish-brown or deep orange, changing into purplish. 

 Bracts with purplish blotches ; leaves glaucous. 



16. A. purpurea. 

 Bracts not with purplish blotches, if at all purplish only along the 



mid-rib. 

 Leaves narrowly linear, glaucous, usually pinnatifid with linear lobes. 



17. A. Greenei. 

 Leaves oblanceolate, usually entire, rarely with short broad lobes 



or teeth. 

 All bracts narrowly linear and acute. 



Plant tall, slender, 3-5 dm. high ; leaves erect ; heads 2-3 cm. 



high. 18. A. gracilens. 



Plant low, 1-3 dm. high; leaves spreading; heads 1.5-2 cm. high. 



19. A. humilis. 

 Outer bracts oblong or lanceolate, often obtuse. 



20. A. aurantiaca. 

 Flowers light yellow, but often turning pinkish ; inner bracts elongated 



in age. 



