45. COMPOSITE. 195 



tff Leaves alternate, cauline. 



(4.) 22. SKNECIO. Fl. of ray in 1 row, ligulate, fern., 

 rarely ; of disk perfect, tubular. Inv. cylindrical or coni- 

 cal, of 1 row of equal phyll. not membranous at the margin, 

 with or without smaller scales at its base. 



(5.) 21. DORONICUM. Fl. of ray in 1 row, ligulate, fern. ; of 

 disk perfect, tubular. Inv. hemispherical, of 2 or 3 rows of 

 equal phyll. Pappus wanting in the ray. 



(6.) 8. LINOSYRIS. Heads not radiant. Fl. all perfect, tubu- 

 lar (yellow). Receptacle naked, pitted ;. pits with elevated 

 dentate margins in our plants. Phyik imbricate. Fr. 

 compressed, silky, without a beak. 



(7.) 4. ASTER. Fl. of ray fern., ligulate, in 1 row : of the 

 disk perfect, tubular, Receptacle naked, pitted. Phyll. 

 imbricate and a few scales on the peduncle. Pappus in 

 many rows. Fr. compressed, without a beak. 



(8.) 5. ERIGERON. Fl. of ray fern., ligulate, in many rows ; 

 of the disk mostly perfect, tubular. Receptacle naked. 

 Phyll. imbricate. Pappus in many rows. Fr. compressed, 

 without a beak. 



(9.) 7. SOLIDAGO. Pappus in 1 row. Fr. terete. (Fl. all 

 yellow.) Otherwise like Aster. 

 



** Anthers with 2 bristles at their base. 



t Receptacle without scales. Fr. cylindrical or tetragonal. 



(10.) 9. INULA. Fl. of ray fern., ligulate, rarely subtubular ; 

 of disk perfect, tubular. Receptacle naked. Phyll. im- 

 bricate in many rows. Pappus hair-like, uniform, in 1 row. 



(11.) 10. PULICARIA. Phyll. laxly imbricate in a few row?. 

 Pappus in 2 rows, outer short cuplike membranous toothed 

 rarely wanting, inner hairlike. Otherwise like Inula. 



ft Receptacle without scales or scaly only at the margin. Fr. 

 cylindrical or compressed. Pappus hairlike. 



(12.) 12. GNAPHALIUM. Fl. all tubular ; outer fem. ; central 

 perfect. Receptacle flat, not scaly. Inv. hemispherical, 

 imbricate ; phyll. equalling the fl. but not intermixed with 

 them. Cor. of the fem. fl. often inconspicuous. 



K 2 



