Lxxviii. COMPOSITE. (J. D. Hooker.) 221 



Anthers sulientire at the basei. Style-arms obtuse, papillose.^ — Leaves opposite or 

 alternate. CvroUa rarely orange, never yellow. Pappus usually bristly. 



Suhtribe 1. PiQUEEiEiE. Anther-tip truncate. 

 Acheiies 5-angled 7. Abbnostemma, 



Suhtribe 2. AoEKAiE^. Anther-tip appendiculate. Achenes 6-angled. 



Pappus paleaceous 8. Agerattjm. 



Pappus of slender hairs. Invol. bracts oo 9. EuPATOEinM. 



Pappus of slender hairs. Invol. bracts 4 10. Mikania. 



Tribe III. Asteroldeae. Heads with the flowers all similar, or the outer 

 ligvdate. Anthers subentire (cells not tailed) at the base. Style-arms flattened 

 or plano-convex, all or those of the disk-flowers terminated by a eone. — Leaves 

 usually alternate. Receptacle almost always naked. JUsh-jlowers yellow ; ray- 

 flowers yellow, white or purple. 



Suhtribe 1. HoMOCHKOMBJS. Flowers all yellow, those of the ray ligulate. 



Ligules few. Heads in scorpioid panicles 11. Solidaqo. 



Svhtribe 2. Granoeine^. Flmvers all yellow, ray 0. Pappus hardly any. 



Eeceptacle usually elongate, top flat. Achenes obtase, flat, 



with a thickened border 12. Dicheooephala. 



Eeceptacle elongate, top convex. Achenes obtuse, flat, ■without 



a thickened border 13. Oyathoclinb. 



Eeceptacle conic or convex. Achenes with a terminal, toothed 



or bristly ring . ' 14. Geanqea. 



Suhtribe 3. Bellibb*. Hay-Bowers $ , ligulate, never yellow. Diskhflowers 

 yellow. Pappus or very short. 



Erect herbs. Achenes viscid, hardly beaked 1.5. Mtetactis. 



Erect rigid herbs. Achenes of ray beaked 16. Ehynchospeemum. 



Small, stemlef s herb. Scape with 1 head 17. Lagenophoea. 



Stem branched, branches with single heads. Achenes beaked 18. Bbachtcome. 



Suhtribe 4. Hetebochrome^. Pay-Lowers $ , ligulate, never yellow. Disk- 

 jlowers yellow. Pappus hairs long, copious, except Boltonia. 



Pappus of short bristles and 2-4 long hairs 19. Boltonia. 



Outer invol. bracts green. Ligules long, l-seriate .... 20. Aster. 



Outer invol. bracts green. Ligules very short 21. Bkachyasteb. 



Outer invol. bracts green, narrow. Ligules 2-3-seriate . . 22. Eeiqeeok. 



Suhtribe 5. OoNTZEai. Mayjlenoers very slender, tubular, or with very short 

 ligules, and diskrjiowers yellow. Papprus copious or scanty. 



Tall or climbing herbs. Heads very small. Pappus long . 23. Miceoglossa. 



Erect herbs. Heads various. Pappus long 24. Contza. 



An erect herb. Heads small. Pappus scanty, short . . .25. Thespis. 



Tribe IV. Xnuloideee. Heads with the flowers all similar, or the outer 

 ligulate. Anther-edls (except Laggera and Phagnalon) tailed. Style-arms linear, 

 obtuse, or styles of the sterile fl. undivided. — Leaves usually alternate. Disk 

 and ray-flowers usually both yellow. 



Suhtribe 1. PLTrcHElNEa:. Heads androgynous. Invol. bracts dry or herba^ 

 ceous, rarely subscarious. Receptacle naked. Style-arms of g fl. filiform, not 

 truncate, or style of sterile fl. entire.' 



* Heads corymbose or panicled, not in globose masses {except in some Blumeas). 



Herbs. Invol. bracts narrow. Pappus copious .... . . 2P. Bltimea. 



HJerbs. Invol., bracts narrow. Amtherredh ecaudaM . . ^ . 27. Laqqbea. 



