Oedbr 10.— composite. 



407 



tonic and febriftifral, aa In tlio chamomile, colt'a-foot, thoroa»hwort golden rod, etc. Some are 

 ftntheliiiintica from the prevftleneo of the reainoiia principle, as tansey, Artemisia, Vernonifl. 

 Others are ftromiitic 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 (Tragopo;;on), the true artichoke (Uynara), lettuce, dandelio'n and a few others, an» 

 the only tspeciea useful for food. The order abounds in ornamcutai plants. 



641, bis. 1. Helianthus head radiate. 2. Vertical section of the head, Ehowing the Ecalee of the IdvoIuctw 

 Bod a siiifclo disk-flower remaining upon the convex receptacle. 1^. A perfect disk-flower Bhowine every 

 parr. 4. Head (radiate) of Solipago. fi. A pistillate, llgulate flower of tlie ray. 6. A perfect disk fl. 7. A 

 <radiant) head of Taraxacum. 8. A perfect, ligulate R. 9. Achenium, with its long beak and plamons 

 pappus. 10. A (radiant) head of Nabalaa altiflsimuB. U. A flower. 12. Lappa major, head discoid. 13, A 

 flower. 11. One of the hooked scales. 15. A Cdiscoid) head of Enpatorium puipurcum. 16. A flower. 

 17. Ambrobia (Pigweed). 18. Staminate head enlarged. 19. Pistillate involucre enlarged. 20. The fertile 

 flower. 



The following (not conveniently used in Analysis) are De CandoUe'a 

 SUBORDBES AND TRIBES. 



L TUBULIFLOB^.— Corolla of the perfect fia. tubular, 5-lobed. (A) 



Teibe 1, Veknoniace-b. Bi-anchea of the style long, slender, terete, and hispid 

 all over. Heads discoid ; flowers all alike perfect Nw. 1 — 3 



Tribe 2, Eupatoriacbje. Branches of the stylo clavate, obtuse, flattened, 

 minLitely pubescent. Hds. discoid. Fla. all alike, perfect Nos. 4 — 15 



TeiubS, Astekoide^. Branches of the style flat, linear, downy abovo and 

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

 or radiate Noa. 16— S6 



Tkibb 4, Senecionid^. Branches of the style linear, fringed at the top, truncate 

 or extended into a conical, hispid appendage Noa. 86—87 



Tkibe 5, Cynare^. Stylo thickened or node-like at top ; branches not appen- 

 daged, the stigmatic lines not prominent, reaching the apex Nos, 83 — 97 



n. LIGULIFLOR^.— Corollas all ligulate (radiant), the flowers all perfect. (B) 



Tribe 6, Ciciiobace^. Branches of the style long, obtuse, pubescent all over ; 



Btigmatic lines commencing below their middle. Juice milky Noe. 98—114 



III. LABtATIFLOR.^.— Corolla of the perfect flowers bilabiate. (C) 



Tbiiik f; MuLi3iACB-«. Style nearly aa In Cynareai, the branches obtuse, very 

 convex outside, minutely downy at the top , JS"©, llfi 



