Senecto.] lxxih. composite (olivee and hiern), 



409 



Cyme compact, dense 



Cyme broad, rather lax .'.*.*'' 



Leaves undivided .....' 



Capitula radiate. 



Leaves fleshy, linear or with linear lobes 



hn^T '''' ^^^^^yfl^^^y; lobes usually not 

 Ligule of the ray-florets very small. Bracts of 



tHe calyculus lanceolate-acuminate 

 Ligule of the ray-florets of moderate size. Bracts 

 of the calyculus subulate or filifc;-m 

 Root perennial. 



Stem rigid or wiry, not fleshy. 

 Appendix of the style-branches long and tapering In- 

 volucre with a broad flat base. 



Leaves sessile 



Leaves petiolate . . . 



Appendix of the style-branches short or 'obsolete' 

 involucre with a campanulate or turbinate base. 

 Habit erect or ascending, not cfiespitose. 

 Herbs or undershrubs. 

 Florets yellow. 



Capitula discoid, without rays. 

 Ehizome tuberous. Heads narrowly tur- 

 binate 



Eoot thick, woody. Heads campanulate 

 Capitula radiate (or in S. steudelioides with 

 inconspicuous or obsolete rays). 

 Inflorescence few (3-13)-headed, lax . 

 Inflorescence many-headed or dense. 



Calyculus obsolete 



Calyculus present. 

 Stem leafy below, with few leaves 



above 



Stems leafy above. 



Involucres narrowly campanulate, 



of 8-10 bracts 



Involucres campanulate or hemi- 

 spherical, of 13-30 bracts. 

 Leaves undivided. 

 Achenes glabrous. 



Involucres campanulate, of 

 13-20 bracts. 

 Leaves from ovate or ob- 

 long to lanceolate. 

 Achenes black or dark 

 brown. 

 Leaves green on both 

 sides . . . 

 Leaves white - to- 

 m e n 1 s e be- 

 neath , . . 

 Achenes pale . . . 

 Leaves linear-lanceolate 

 Leaves elongate-linear- 

 lanceolate . . . 

 Involucres hemispherical, 

 of 25-30 bracts . . 

 Achenes setulose .... 



4. S. vulgaris. 

 6. S. arabicus. 



6. 8. Schimperi. 



7. S. coronopifolius. 



8. S. pinnatipartittis. 



9. 8. PerroCtetii. 



10. 8. picridifoliiis. 



11. 8. macropappus. 



12. 8. tuberosm. 



13. 8. Hockstetteri. 



14. 8. paucifoUus. 



15. 8. bupleuroides. 



16. 8, lasiorhiztu. 



17. 8. confer tus. 



18. 8. stibsessilis. 



19. 8. Burtoni. 



20. 8. ochrocarpus. 



21. /S. Steudelii, 



22. 8. Fresenii. 



23. 8. 8chuHzii. 



24. 8. 7nyriocephalu4. 



