164 45. coMPOSiTjj. 



Suborder I. CORYMBIFERjE. 



Florets of the disk tubular ; marginal florets often ligulate. 

 Style not swollen below its branches. 



A. Pappus more or less hairy. 



* Anthers without bristles at theii- base. 



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

 cate oblong. Receptacle naked. Florets tubular-funnel- 

 shaped, hermaphrodite. Anth. included. Branches of the 

 style exserted, cylindrical obtuse. 



(2.) 2. Petasites. Heads many-flowered, subdioscious. Fern, 

 florets filiform, obliquely truncate or shortly ligulate, in many 

 rows in the fem. heads, none or in 1 row in the male heads. 

 Male florets tubular, few and central in the fem. heads, occu- 

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

 Phyll. in one row. — Plants subdioecious. 



(3.) 3. TussiLAGO. Heads many-flowered, heterogamous. 

 Fem. florets marginal, in many rows, narrowly hgulate. 

 Male florets discoidal, tubular, 5-cleft. Receptacle naked. 

 Phyll. in 1 row, with membranous margins. 



(4.) 23. Senecio. Florets of the ray ligulate, fem., rarely ; 

 of the disk perfect, tubular. Involucre cylindrical or conical 

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

 or without smaller scales at its base. Pappus pilose. 



(5.) 22. DoRONicuM. Florets of the ray ligulate, fem. ; of 

 the disk perfect, tubular. Involucre hemispherical of 2 or 3 

 rows of equal phyll. Pappus pilose, wanting in the ray. 



(6.) 8. LiNOSYRis. Heads not radiant. Florets all perfect, 

 tubular. Receptacle naked, pitted, pits with elevated den- 

 tate margins in our plant. Phyll. imbricated. Pappus 

 pilose. Fr. compressed, silky, without a beak. 



(7.) 4. Aster. Heads radiant. Florets of the ray fem., 

 ligulate, in 1 row; of the disk perfect, tubular. Receptacle 

 naked, pitted. Phyll. imbricated and a few scales on the 

 peduncle. Pappus pilose, in many rows. Fr. compressed, 

 without a beak. 



(8.) 5. Eeigeron. Heads radiant. Florets of the raj/ fem., 

 ligulate, in many rows ; of the disk mostly perfect, tubular. 

 Receptacle naked. Phyll. imbricated. Pappus pilose, in 

 many rows. Fr. compressed, without a beak. 



(9.) 7- SoLiDAGO. Pappus pilose, in 1 row. Fr. terete. 

 Otherwise like Aster. 



