45. COMPOSITE. 181 



Suborder I. CORYMBIFER^. 



Flowers of the disk tubular and perfect ; marginal flowers 

 often ligulate and female or neuter. Style not swollen below 

 its branches. — Juice watery. 



A. Pappus more or less hairlike. 



* Anthers without bristles at their base. 



t Leaves opposite, cauline. 



(1.) 1. EtrPATOBiuM. Heads few-flowered. Phyll. imbri- 

 cate, oblong. Receptacle naked. Fl. all tubidar-ivxanel- 

 shaped, perfect (reddish purple). Anth. included. Branches 

 of the style exserted, cylindrical, blunt. 



tt Leaves radical. 



(2.) 2. Pbtasitbs. Seads many-flowered. Fem. fl. filiform, 

 obliquely truncate or shortly ligulate, in many rows in the 

 fem. heads, none or in 1 row in the male heads. Male fl. 

 tubular, few and central in the fem. heads, occupying the 

 whole disk in the male heads. Receptacle naked. Phyll. 

 in one row. — Subdioedous. Heads panicled. 



(3.) 3. TtrssiLAGO. Heads many-flowered. Fl. of ray nar- 

 rowly ligulate, fem. in many rows ; of disk male, tubular, 

 5-cleft. Receptacle naked. PhyU. in 1 row, with mem- 

 branous margins. — Heads solitary. 



ttt Leaves alternate, cauline. 



(4.) 22. Sbnecio. Fl. of ray in 1 row, ligulate, fem., 

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

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

 with or without smaller scales at its base. 



(5.) 21. DoEONiCTna. Fl of ray in 1 row, ligulate, fem. ; of 

 disk perfect, tubular. Inv. hemisphm-ical, of 2 or 3 rows of 

 equal phyll. Pappus wanting in the ray. 



(6.) 8. LiNOSYBis. Seads not radiant. Fl. all perfect, tubu- 

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

 dentate margins in^ our plants. PhyU. imbricate. Fr. 

 compressed, silky, without a beak. 



(7.) 4. AsTEE. Fl. of ray fem., 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. 



