Obdhb 'ZO.— composite. 



407. 



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

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

 Others arc aromatic and extremely bitter, as wormwood and all the Bpeciea of Artemisia, Other 

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

 table oyster (Tragopogon), the true artichoke (Oynara), lettuce, dandelion and a few others, ara 

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



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

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

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

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

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

 flower. 14. One of the hooked scales. 16. A ("discoid) head of Bupatorinm purpureum. 16. A flower. 

 17. Ambrosia (Pigweed). IS. Staminate bead enlarged. 19. Pistillate involucre enlarged. 20. The fertile 

 flower. 



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

 SUBORDERS AND TRIBES. 



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



Tkibb 1, Vernoniace^. Branches of the stylo long, slender, terete, and hispid 

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



Tkibb 2, Eupatokiace^. Branches of the style clavate, obtuse, flattened, 

 minutely pubescent. Hds. discoid. Fls. all alike, perfect Nos. 4 — 15 



Tribe 3 , Astbroide^. Branches of the style flat, linear, downy above and 

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

 or radiate ,Nos. 16 — 35 



Tribe 4, Senecionid-b. Branches of the style linear, fringed at the top, truncate 

 or extended into a conical, hispid appendage Nos. 86— S7 



Tribe 5, Cynarbjb. Stylo thickened or node-like at top ; branches not appen- 

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



II. LIGULIFLOE^.— Corollas all ligulate (radiant), the flowers all perfect^ (B) 

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



stigmatic linesNjommencirig below their middle. Juice milky Nos. 98 — 114 



Iir. LABIATIFLOKiE^-Corolla of the perfect flowers bilabiate. (C) 

 TaiBE T, MTJL1SIACE.B. Style nearly as in Cynareie, the branches obtuse, very 

 convex outside, minutely downy at the top No. 115 



