ORDER 70. COMPOSITE. 



407 



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

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

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



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

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

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



641 , bis 



section of (he head, (bowing the scale 



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

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

 (radiant) head of Taraxacum, f. A perfect, lig-ulate fl. <). Aclienium, with its long beak and plumous 

 pappus. 10. A (radiant) head of Xabalus ahissimn?. 11. A flower. 12. Lnppa major, head discoid. 13. A 

 flower. 14. One of the hooked scales. 15. A (discoid) head of Enpatorinm purpnrcum. 16. A flower. 

 17. Ambrosia (Pigweed). IS. Staminate head enlarged. Itf. Pistillate involucre enlarged. 0). The fertile 

 flower. 



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

 SUBORDERS AND TRIBES. 



I. TUBULIFLOn^-E. Corolla of the perfect fls. tubular, 5-lobed. (A) 



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

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



TEIBB 2, ECPATORIACE/E. Branches of the style clavate, obtuse, flattened, 



minutely pubescent. lids, discoid. Fls. all alike, perfect Nos. 4 W 



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

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

 or radiate Nos. 16-35 



TRIBE 4, SEXKCIONID^. Branches of the style linear, fringed at the top, truncate 

 or extended into a conical, hispid appendage Nos. 3687 



TRIIJK 5, CYXAUEJE. Style thickened or node-like at top ; brandies not appen- 

 daged, the stigmatic lines not prominent, reaching the apex Xos. 8837 



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

 TRIBB G, CICIIORACE-B. Branches of the style long, obtuse, pubescent all over ; 



stigmatic lines commencing below their middle. Juice milky \os. 98114 



III. LABIATIFLOTLE. Corolln of the perfect flowers bilabiate. (C) 



TRIBE 7, MULISIACE^E. Stylo nearly as in Cynareffi, the branches obtuse, very- 

 convex outside, minutely downy it the top No. 115 



