166 COMPOSITJE. IComposita. 



FIoTets of the circamfereoce rer^ numerons. Sisk-florets few. 



Involucral bracts scarious, often coloured ... . . • 81. Gnaphalium. 

 Involacral bracts herbaceons or subulate. 

 Anthers obtuse at the base (without tails). 



Horets of the circnmferfence Ijgujate, though slender, 



short and erect . , 12. Eeigebon. 



Morets of the circumference ali tubular and filiform . . 13. Conxza. 

 Anthers with hair-hke points (simple tails) at the base, 

 flowerrheads clustered oi? paniculate. Style; of the disk^ 



florets all bifld ,14. Blumea. 



Mower-heads corymbose. Styles of the disk-florets often 



undivided 15. Fluqhea. 



Pappus none, or very short. 

 Worets of the circnmference few. Achenes obovate or rounded 



at the top, Drect herbs or uudershrnbs ...... 30. Abtemisia. 



Florets of the circnmference very mmieroua. Achenes flat or 

 concave at tfee top. Prostrate annuals. 

 Receptacle very qonvex. 

 Flower-heads racemose or paniculate. Style-branches in 



the disk-florets acute 9. Dicheocephaia. 



Flower-heads solitary. 3tyle-brancbe3 in the disk obtuse 27. GrBAHeEA. 

 Eeceptacle flat or nearly so. 



Florets of the circumference apetalous or nearly so. 



Hower-heads terminal 28. Cotula. 



Florets of the circumference with a corolla nearly as long 



as the style. Flower-heads leaf-opposed ..... 29. Myeiosyne. 



§ 3. Flower-heads monoecious, the males globular, many-flowered, discoid; the females 

 Z-flowered, with a priokly Surr-li&e i-eeHed imohuir$. 



Single genus 19. Xanthiuju. 



§ 4. Flower-heads heterogamoiis, radiating. 

 Leaves opposite. Beceptacle paleaceous. 

 Pappus none. 

 External involucral braots linear-spathnlate, spreading, glan- 

 dular , 21. SlEQESBECKXA. 



External involucral bracts ovate or oblong, not glandular. 



Disk-florets 4-toothed 20. Eclipta. 



Disk-florets B-toothed 23. Wollastonia. 



Pappus a little fringed cup . , 22. Wedeha. 



Pappus of 1 to 3 slender deciduous awns 23. WoilASTONU. 



Pappus of 2 to 5 persistent retrorsely hispid stiff awns. Achenes 



long 24. BiDENS. 



Leaves alternate. Beceptacle paleaceous. 

 Pappus of 2 or 3 stiff persistent awns. Anthers without tails. 



Achenes long 35. Glossooyne. 



Pappus of several short pointed scales or awns. Anthers with 



'sils 18. Amsqpapfus. 



Leaves alternate. Beceptacle naked- 

 Pappus none or very short. 

 Achenes ending in a short beak. Flower-heads small ... 8. Laoei; ophoba. 

 Achenes not beaked, 



Eeceptacle very convex. Pappus of very short scales or 



Wstles .10. Bqmoisha. 



Eeceptacle flat or slightly convex. Pappus none, or a short 



ling or cup 26. Chrysanthemum. 



Pappus of numerous long hairs or capillary bristles. 

 No bilabiate florets. Anthers obtuse at the base (stem leafy). 



Bay white or purple \\, Astes. 



