176 45. COMFOSIEaTv 



Snborder I. CORYMBIFER^. 



Ilowers of the disk tubular and perfect ; marginal ffowers 

 often ligulate and female or neuter. Style not swollen belaw 

 its branches. — Juice watery. 



A. Pixppti» more or less hairlike^ 



* Anthers without bristles at their base, 



t Leaves opposite, cauline. 



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

 cate, oblong. Receptacle naked. JFl. all tubular-iuimel- 

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

 of the style exserted, cylindrical, Wmit, 



tf Leaves radicdL 



(2.) 2. Pbtasites. Heack many-flowered. Fern. ff. filiformy 

 obliq^uely 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. Phylk 

 in one row. — Subdiceeious. Heads panicled. 



(3.) 3. TussiLAGO. 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 menL- 

 branous margins. — Heads solitary. 



ttt Leaves alternate, cauline. 



(4.) 22. Sbnbcio. Fl. of ray in one row, ligulate, fem., 

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

 cal, of 1 roto of equal phyll. not membranous at the margirif 

 with or without smaller scales at its base. 



(6.) 21. DoaoNicuM. Fl. of ray in 1 row, ligulate, fem. ; of 

 disk perfect, tubular. Lnv. hemispherieal, of 2 or 3 rows of 

 equal phyll. Pappus wanting in the ray. 



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

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

 dentate margins in our plants. Phyll. imbricate. Fr.' com- 

 pressed, silky, without a beak. 



(7.) 4. AsTEE. FL of ray fem., ligulate, in 1 row ; of the- 

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

 imbricate and a few scales on the peduncle. Pappus iu 

 majiy rows. Fr. compressed, without a beak. 



