COMPOSURE. (cOMPOSITli FAMILY. ) 137 



Suborder II. LABIATIFI>OR.E. Corolla of the perfect flowera 



2-linned ; the outer lip 3-lobetl, the mner 'J-lobed. 



No. 



Herb stemlcs.f. Scape 1 flowered. Flower nodding. . . . CUAPTALIA. 80 



Suborder 111. LIGULIFLORJ:^. Corolla of all the flowers li- 

 guh-ite. 



Pappus none. Arhenia inany-rihliod APOGOX- 81 



Pappus SGily and bristly. 



Scales of the pappus 5, with 5 intermediate bristles KRTGIA. 82 



Scales of tlie pappus and bristles numerous. . . . • . . . CYNTHIA. 83 

 Pappus hairy. 

 Pappus tawny or dirty-white. 



Flowers erect, rose-color. I-caves filiform LYGODESMTA. 86 



Flowers erect, j'c'lo"'- Achenia be:ikles3 IIIERACIUM. 84 



Flowers erect, yellow. Achenia long-beaked PYRRIIOl'APPUS. 88 



Flowers nodding, whitish or purplish. NABALUS. 85 



Pappus clear white (except in one Mulgedium). 

 Achenia conspicuously beaked. 



Achenia ribbed. Stemless herbs. TARAXACUM. 87 



Achenia flat. Stems leafy LACTUCA. 89 



Achenia beakless or nearly so. 



Flowers blue. Achenia slightly beaked. MULGEDIU3I. 90 



Flowers yellow. Achenia beakless SONCIIUS. 91 



Suborder I. TUBUL.IFL,OR.E. 



Tribe I. YERNONIACEjE. n< ads discoid ; the Jlowers all tubular and per- 

 fi'c.l : branches of the style terete, Jiliform, hairy all over ; the stii/matic lines only on 

 the lower part. — Herbs, with alternate leaves and purple Jlowers. Pecti.s alone 

 has pistillate rays and yellow Jlowers. 



1. VERNONIA, Schrel). Irox-avked. 



Heads many-flowered, the flowers all equal and tuhular. Involucre shorter 

 than the flowers ; the scales closely imhricated in several rows. Receptacle 

 naked. Achenia cylindrical, rihbed. Pappus double; the exterior consisting 

 of very short scale-like bristles, the interior of copious capillary bristles. — Per- 

 ennial herbs, with alternate leaves, and corymbose purple flowers. 



1. V. oligophylla, Michx. Stem nearly naked; leaves rough above, 

 pti!)escent beneath, denticulate; those at the base large, oval or oblong, the 

 o hers small, distant, lanceolate; corymb fcw-flowcrcd, spreading; involucre 

 boll-shaped, the scales lanceolate, acuminate, fringed. — Damp soil, Geor- 

 gia to North Carolina, and westward. July. — Stem 2° high, sparingly 

 branched. 



2. V. OValifolia, Ton-. & Gray. Stem pubescent, very leafy, corymbose- 

 branched above ; leaves roughish above, pubcsceni, beneath ; the lowest ones 

 oval or oblong, toothed-serrate ; the upper lanceolate and entire ;. involucre bell- 



