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



Anthers subentire at the base. Style-arms obtuse, papillose. Leaves opposite or 

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



Subtribe 1. PiQTJERiE^. Anther-tip truncate. 

 Achenes 5-anglod 7. ADENOSTEMMA. 



Subtribe 2. AGERATE^B. Anther-tip appendiculate. Achenes 5-angled. 



Pappus paleaceous . 8. AGERA.TTTM. 



Pappus of slender hairs. Invol. bracts co ...'.... 9. ETJPATORIUM. 

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



TRIBE III. Asteroideae. Heads with the flowers all similar, or the outer 

 ligulate. Anthers subentire (cells not tailed) at the base. Style-anns flattened 

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

 usually alternate. Receptacle almost always naked. Disk-flowers yellow ; ray- 

 flowers yellow, white or purple. 



Subtribe 1. HOMOCHROMEJS. Flowers all yellow, those of the ray ligulate. 



Ligules few. Heads in scorploid panicles 11. SOLIDAGO. 



Subtribe .2. GRANGEINE^. Flowers all yellow, ray 0, Pappus hardly any. 



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



with a thickened border 12. DICHROCEPHAJ.A. 



Receptacle elongate, top convex. Achenes obtuse, flat, without 



a thickened border 13. CYATHOCLINE. 



Eeceptacle conic or convex. Achenes with a terminal, toothed 



or bristly ring 14. GRANGEA. 



. Subtribe 3. BELLIDE^. Ray-flowers $ , ligulate, never yellow. Disk-flowerg 

 yellow. Pappus or very short. 



Erect herbs. Achenes viscid, hardly beaked . . . . . . .15. MYRIACTIS. 



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



Small, stemless herb. Scape with 1 head 17. LAGENOPHORA. 



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



Subtribe 4. HETEBOCHROME^E. Say-flowers <j> , ligulate, never yellow. Disk- 

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



Pappxis of short bristles and 2-4 long hairs 19. BOLTONIA. 



Outer invol. bracts green. Ligules long, 1- seriate . . . . 20. ASTER. 



Outer invol. bracts gr-een. Ligules very short 21. BRACHYASTER. 



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



Subtribe. 5. CONTZE^E. Ray flowers very slender, tubular, or with very short 

 ligules, and disk-flowers yellow. Pappus copious or scanty. 



Tall or climbing hfrbs. Heads very small. Pappue long . 23. MICROGLOSSA. 



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



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



TRIBE IV. Inuloideae. Heads with the flowers all similar, or the outer 

 ligulate. Anther-cells (except Laaaera and PhaWahn) tailed. Style-arms linear, 

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

 and ray-flowers usually both yellow. 



Subtribe 1. PLTJCHEINE^:. Heads androgynous. Invol. bracts dry or herba- 

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

 truncate, or style of sterile fl. entire. 



* Heads cwymbose or panicled, not in globose masses (except in some Blumeas). 



Herbs. Invol. bracts narrow. Pappus copious 26. BLTTMEA. 



Herbs. Icvol, bracts narrow. Anther^cells ecaudate . . .27. LAGGERA. 



