ORTJBR 70. COMPOSITE. 



407 



tonic and febrifugal, as in the chamomile, colt's-foot, thoroughwort golden rod, etc. 8ome are 

 anthelmintics from the prevalence of the resinous principle, as tansey, Artemisia, Yernonia. 

 Others are aromatic and extremely bitter, as wormwood and all the species of Artemisia. Other 

 species are very acrid, as mayweed. The Jerusalem artichoke (Helianthus tuberosus) the vege- 

 table oyster (Tragopogon), the true artichoke (Cynara), lettuce, dandelion and a few others, are 

 the only species useful for food. The order abounds in ornamental plants. 



641, bis. 1. Helianthus head radiate. 2. Vertical section of tlie head, showing the scales of the involucre 

 and a single disk-flower remaining upon the convex receptacle. 3. A perfect disk-flower showing every 

 part. 4. Head (radiate) of Solipago. 5. A pistillate, ligulate flower of the ray. 6. A perfect disk fl. 7. A 

 (radiant) head of Taraxacum. 8. A perfect, ligulate fl. 9. Achenium, with its long beak and plumous 

 pappus. 10. A (radiant) head of Nabalus altissimue. 11. A flower. 12. Lappa major, head discoid. 13. A 

 flower. 14. One of the hooked scales. 15. A (discoid) head of Eupatorinm purpureum. 16. A flower. 

 17. Ambrosia (Pigweed). 13. Staminate head enlarged. 19. Pistillate involucre enlarged. 20. The fertil* 

 flower. 



The following (not conveniently used in Analysis) are De Candolle's 

 SUBORDERS AKD TRIBES. 



I. TUBULIFLORJ3. Corolla of the perfect fls. tubular, 5-lobed. (A) 



TRIBE 1, VERXONIACE.. Branches of the style long, slender, terete, and hispid 

 all over. Heads discoid ; flowers all alike perfect Nos. 1 & 



TRIBE 2, ECPATORIACE*. Branches of the style clavate, obtuse, flattened, 

 minutely' pubescent. Hds. discoid. Fls. all alike, perfect Nos. 415 



TRIBE 3, ASTEROIDE.E. Branches of the style flat, linear, downy above and 

 opposite the distinct, stigmatic lines, appendaged at top. Heads discoid 

 or radiate T Nos. 1635 



TBIBE 4, SEXECIOXID^E. Branches of the style linear, fringed at the top, truncate 

 or extended into a conical, hispid appendage Nos. 36 S7 



TBIBE 5, CYNAREJS. Style thickened or node-like at top ; branches not appen- 

 daged, the stigmatic lines not prominent, reaching the apex .: Nos. 88 97 



II. LIGULIFLOR-E. Corollas all ligulate (radiant), the flowers all" perfect. (B) 

 TRIBE 6, CICIIORACE^:. Branches of the style long, obtuse, pubescent all over ; 



stigmatic lines commencing below their middle. Juice milky Nos. 93 114 



III. LABIATIFLORJS. Corolla of the perfect flowers bilabiate. (C) 



TKIBE 7, MULISIACE^E. Stylo nearly as in Cynareae, the branches obtuse, very 



convex outside, minutely downy at the top t No. 115 



