COMPOSITJE. 18S EUPATORIDM, 



Suborder II, LIGULIFLOR.^. 



Flowers all U.gulate and perfect, arranged in a radiant head. Juke milky 

 and bitter. 



( Scales of the invol. equal : pappus double. Krigin. 58 



( Flowers yellow ( Outer scales shortest, pappus capillary. Toraxicvm. 63 

 ■ radical.. { Flowers white ; pappus plumose, . . . . . Leontodon. 61 



( Pappus single, brist. Hieracimn. 66 



( Lvs.unarm'd. ( Pap doub.. outer scaly. Cynthia. 59 



(Fls. yellow. ( Lvs. spinose-denl.; pap. very white. Sonchw:. 65 



fAchenia < Flowers blue. Pappus .sicalL, scaly. . . Ciclidrium. 57 



I not rost. ( Fls. whitish orcreain col. Pap. copious, capillary. Nabalus. 64 



.{ ( with a fill- I Involucre with calyculate scales. Lartuca. 62 



I Achenia < form beak. . | Involucre without calyculate scales. Tra^ojjogon. 60 



2 i,cauline. [rostrate ( with a short, thick beak ; involucre imbricate. Mulgedium. 67 



Suborder I. TUBULIFLOR^. 



Corolla of the perfect Jlowers tuhular, regular, the limb o-clefc, or lobed. 



Tribe I. VERNONIACE^. 



Heads discoid, homcgarnuiis. Brandies ofiiie style subulate, hispid throughout. 



1 . V E R N O' N 1 A . 



Flowers all tubular; involucre seniicjlindric, of ovate, im- 

 bricated scales; receptacle naked; pajipus double, the exterior 

 chaff} ; the interior capillary. 



Named for Mr Wm. Vernon, fellow of St. Peter's College, Cambridge, 

 Eng., who travelled in N. America in search of plants, i'erennial herbs or 

 shrubs. Lvs. mostly alternate. 



V. NOVEBORACE'NSIS. 



ieaces numerous, lanceolate, serrulate, rough; cyme fastigiate ; scales of 

 involucre filiform at the ends. A tall, showy plant with numerous large, 

 dark purple flowers, found in meadows and other moist situations. Stem 

 branching at top, reddish, about 4 feet high. Leaves crowded, paler beneath, 

 radical ones often lobed. Cymes terminal, tlat-topped, compound. Scales and 

 corollas deep purple, the former ending in long threadlike appendages. Sept. 



Kew York Vernonia. Iron-weed. 



p. praalta ; stnn and leaves beneath pubescent; scales of the involucre 

 destitute of the filiform appendages. Rather taller than the preceding, habits 

 similar. 



Tribe II. EUPATORIACE^E. 



Heads discoid or radiate. Branches of the style mucli elongated, obtuse, tninutely pubescent 

 towards the summit outside. Anthers not cordate. Leaves mostly opposite. 



Section I. Heads discoid, Iiomogamous* 



2. EUPATO'RiUM, 



Flowers all tubular; involucre imbricate, oblong; style 

 much exserted, deeply cleft; receptacle naked, flat; pappus 

 simple, scabrous. 



This genus, says Pliny, derived its name from Eupater, king of Pontus, 

 who first used it in medicine. Perennial herbs with opposite or verticillate 

 Jeiives. Heads corymbose. Fls. cyanic. Ach. 5-angled. Anth incltided. 



