L.vxr. composit.t;. 3 



Shrubs or undershrubs. 



Invol.-bracts dry, usually broad ; 

 styles of ^ flowers usually 



undivided 15. Pluciiea. 



Pappus 0. 



A low rigid herb ; heads sessile, 

 crowded ; corollas of ^ flowers 



2-li[jped 16. Nanotha.m.\u3. 



Erect or diffuse herbs ; corollas 



of ^ flowers tubular 17. Epai.tes. 



Heads collected into dense globose or ovoid 

 terminal masses ; corollas of 2 flowers 

 filiform. 



Pappus 0. Herbs with winged stems ... 18. Sph.krantiius. 



Suhtrihe 2. FiLAGiisrE.E. Heads androgynous. $ flowers en- 

 closed in the palese of the receptacle ; ^ flowers in the 

 centre of the head, often naked. Invol.-bracts scarious or 

 hyaline, rarely dry or radiating. Corollas of $ flowers 

 filiform. Style of ^ flowers undivided or with obtuse or 

 subulate (not truncate) arras. 



Glabrous shrubs or undershrubs ; achenes 



large, 2-4-angled or many -ribbed, ciliate... 19. Blepharispeemum. 



Suhtrihe 3. GtNaphalie^. Heads androgynous or homogamous, 

 discoid. Invol.-bracts scarious, often hyaline. E-eceptacle 

 without paleae. Style-arms of ^ flowers truncate. Herbs. 



Aclienes all pappose ; ^ flowers all fertile ; 

 style bifid. 



Pappus-hairs plumose 20. Lasiopogon. 



Pappus-hairs not plumose 21. Gnaphaliuji. 



Suhtrihe 4. EuiNULE^. Heterogamous, rayed (rarely subdis- 

 coid) ; or homogamous, rayless. Flowers usually all fertile. 

 Receptacle naked or with a few paleae. Style-arms of ^ 

 flowers rounded or dilated at the apex. 



Heads rayed ; pappus-hairs few or many, 



subequal ; achenes ribbed 22. Inula. 



Heads usually rayed ; pappus-hairs slender, 

 those of the ray few or ; achenes not 

 ribbed 23. Vicoa. 



Heads rayed or discoid ; outer pappus of 

 scales forming a cup, inner pappus of hairs; 

 achenes usually ribbed 24. Pulicauia. 



Heads homogamous ; pappus of 2 ovate 



scales; achenes flat, winged. 25. C^sulia. 



Tktbe V. HELIANTHE.ffi. Heads heterogamous, usually rayed ; 

 or homogamous, rayless. Eay-flowers $ , fertile or neuter ; 

 disk-flowers g , fertile or sterile. Eeceptacle paleaceous. Anther- 

 bases not tailed. Style-arms of ^ flowers truncate or appendi- 

 culate, or style of sterile flowers undivided. Pappus of 2-5 

 bristles or shortly paleaceous or 0. Achenes various, usually- 

 compressed, angular. Leaves (at least the lower ones) usually 

 opposite. Flowers usually yellow. 



Suhtrihe 1. Lagasceje. Heads 1-flowered, in globose ckisters. 

 Invol.-bracts forming a toothed or fimbriate cup or ring. 



A villous or scabrid herb ; lower or all the 



leaves opposite 26. Laoasca. 



b2 



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