CHICORY FAMILY 277 



stem glabrous or puberulent. 2. H. scabriusculum. 



Involucres of the rather small heads of an almost single series of principal bracts and 

 small calyculate ones below. 

 Flowers yellow. 



Plant 4-10 dm. high, leafy. 



Involucres and pedimcles densely hairy with long yellow hairs. 



3. H. alberiinum. 

 Involucres blackish and glandular, without or with a few scattered yellow 

 hairs. 

 Involucres 8-10 mm. high, with scattered yellow hairs. 4. H. griseum. 

 Involucres 6-8 mm. high, without yellow hairs on the involucre or peduncles. 



5. H. cynoglossoides. 

 Plant low, 1-3 dm. high, with 1-3 stem-leaves and few heads. 



6. H. graclle. 

 Flowers white or ochroleucous. 7. H. albiflorum. 



23. AGOSERIS Raf. Goat Chicory. 



Perennials. 



Beak short, scarcely more than half as long as the body of the achene, striate through- 

 out. I. Glaucae. 

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

 the middle. 

 Body of the achenes tapering at the apex. II. Aukantiacae. 

 Body of the achenes truncate at the apex. III. Retrorsae. 

 Annuals. IV. HETEROPHYliliAE. 



I. Glaucae. 

 Leaves decidedly pubescent, even in age. 



Outer bracts linear-lanceolate to oblong, obtuse or acute. 

 Outer bracts linear-lanfeeolate. 



Plant tall and stout, 3-5 dm. high; involucres broadly carapanulate, about 



2.5 cm. high and 2.5-3 cm. wide. 1. A. taraxacifoHa. 



Plant low, 1-2 dm. high; involucres less than 2 cm. high and 1-2 cm. wide. 

 Leaves Unear-oblanceolate, 6-10 cm. long; peduncle slender, about 2 dm. 



high. 2. A. pubescens. 



Leaves oblanceolate, 4-6 cm. long, often lobed or toothed; peduncles 1 dm. 

 high or less. , 3. A. aspera. 



Outer bracts oblong or oblong-ovate. 



Scape low and stout, about 2 dm. high; leaves oblanceolate, about 1 dm. long. 



4. A. villosa. 

 Scape tall, about 6 dm. high; leaves 2-3 dm. long; flowers tm-ning purple. 



5. A. altissima. 

 Outer bracts ovate or ovate-lanceolate, acuminate. 6. A. maculata. 



Leaves in age glabrate and glaucous. 



Bracts villous-ciliate, at least on the margins. 



Involucre turbinate; leaves narrowly linear; flowers light yellow, turning pink. 



7. A. turbinata. 

 Involucres campanulate to hemispherical; leaves oblanceolate or lanceolate. 



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



8. A. attenuata. 

 Inner bracts merely acute. 



Leaves obtuse or acute, entire or rarely toothed. 



Outer bracts much broader than the inner, often obtusish: plant gener- 

 ally low and leaves short, obtuse. 9. A. pumila. 

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

 high; leaves long and acute. 10. A. scorzoneraefolia. 

 Leaves acuminate, more or less pinnatifld. 11. A. agreslis 

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



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



rose-colored. 12. A. roseata. 



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

 Leaves entire or toothed; flowers yellow, turning pink. 



Leaves linear-oblanceolate. 13. A. glauca. 



Leaves narrowly Unear. 14. A. parviflora. 



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

 Bracts, with loose spreading tips ; heads broadly campanulate. 



1.5. A. rosea. 

 Bracts appressed; heads more or less turbinate. . 16. A. laciniata. 



II. AURANTIACAE. 

 Bracts all broad, ovate to elliptical, abruptly acuminate. 17. A. montana. 



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



Involucres more or less regularly imbricate; beak about equalling the body of the 

 achenes. 

 Leaves densely pubescent. 



Plant low; flowers purple. 18. A. arachnoidea. 



Plant tall; flowers yellow. 19. A. elata. 



Leaves glabrous or nearly so, somewhat hairy in No. 27. 



Flowers reddish brown or deep orange, changing into purplish. 



Bracts with purpU.sh blotches; leaves glaucous. 20. A. purpurea. 



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

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



21. A. graminifolia. 



