186 COMPOSITE. 



Outer flowers hgvlate, white or 0. Receptacle with scaly or bristly bract>l' -. 



Ligiile oblong. Fruit terete or angled 18. Anthemis. 



Ligule broad, short. Fruit compressed, winged 19. Achillea. 



Flowers all tubular and compressed 20. Diotis. 



Outer flowers ligulate, white or yellow. Receptacle naked. 



Receptacle conic, often elongating 21. Matricaria. 



Receptacle flat or convex 22. Chrysanthemum. 



Flowers all tubular. Receptacle naked. 



Receptacle broad. Epigynous disk broad 23. Tanacetum. 



Receptacle narrow. Epigynous disk small 24. Artemisia. 



TRIBE VIII. GNAPHALIE^E. Leaves alternate, quite entire. //../. 



braclf scarious. Flowers all tubular, outer excessively slender, female. 



Anther-cells with filiform tails. Style-arms linear, truncate or obtuse, tips 



papillose. Pappus-hairs very slender, silky. 



Heads 2-sexual. Receptacle flat, naked ' 25. Gnaphalium . 



Heads almost dioecious. Pappus of male clavate 26. Antennaria. 



Heads 2-sexual. Receptacle conical ; bracteoles few 27. Filago. 



TRIBE IX. SENECION IDE^E. Leaves alternate. F hirers all yellow, 

 tubular and 2-sexual, or outer ligulate. Receptacle naked. . I ntl,<,- -<-,//. 

 without tails. Style-arms as in Gnaphaliea, but sometimes tipped with 

 short papillose cones (as in Asteroidece). Pappus-hairs usually very soft 

 (rigid in Doronicum). 



Invol. bracts in many series 27*. Doroi,:,-,i,n. 



Invol. bracts hi one series 28. Senecio. 



SERIES 2. LIGULIFLO'R.E. Flwnen all ligulate. Juice milky. 

 TRIBE X. CICHORA CE-ffi. Leaves alternate. Style cylindric, pubescent 

 above ; arms linear, J-terete, obtuse, pubescent at the back ; stigmatic 

 lines not confluent. 



Pappus .' 29. Lapsana. 



Pappus a coriaceous raised border 30. Arnoseris. 



Pappus of short broad scales 31. Cichorium. 



Pappus of inner fruits of feathery hairs, often dilated at the base. 



* Receptacle covered with narrow bracteoles 32. Hypochasris. 



** Receptacle naked. 



Fruit with a long slender beak. 



Leaves toothed. Outer invol. bracts cordate 33. Helminthia. 



Leaves quite entire. Invol. bracts narrow 34. Tragopogon. 



Fruit with a short beak. 



Invol. bracts 1 -seriate, with a few outer short ones 35. Picris. 



Invol. bracts 2-3 seriate 36. Leontodon. 



Pappus of simple hairs not dilated at the base. 



* Pappus-hairs white, silky (except Crepis paludosa). 



Fruit with a long slender beak. 



Fruit compressed, not muricate. Leafy branched herbs 37. Lactuca. 



Fruit muncate upwards. Scapigerous herbs 38. Taraxacum. 



Fruit terete, not muricate 39. Crepis, sect. Barkkau&ia. 



Fruit vrith a short thick beak or 0. 

 Fruit angled or terete, much compressed 40. Sonchus. 



