238 composite, (composite family.) 



2. V. Virginica, L. Stem 3-winged ; the branches mostly wingless, to- 

 mentosc ; leaves ovate or ovate-lanceolate, irregularly serrate or sinuate-lobed, 

 tapering into winged petioles, rough above, downy beneath ; corymbs eymose ; 

 rays 3-4, oval, white; aehenia winged. (V. sinuata. Ell) — Dry open woods, 

 Florida and northward. Sept. — Stem 2° - 6° high. 



55. FLAVERIA, Juss. 



Heads few-flowered, discoid, or with a single pistillate ray. Involncre of 3-5 

 oblong nearly equal scales. Receptacle naked. Aehenia oblong or club-shaped, 

 smooth, striate. Pappus none. — Tropical herbs, with opposite leaves, and 

 densely clustered heads of yellow flowers. 



1. F. linearis, Lagasca. Stem somewhat prostrate at the base, branched 

 above, smoothish ; leaves fleshy, .linear, connate, entire; corymb dense; scales 

 of the involucre mostly 5; ray often wanting. — Key West. — Stem l°-2° 

 high. 



56. GAILLARDIA, Foug. 



Heads mnny-flowered ; the rays neutral, deciduous. Scales of the involucre 

 in 3 rows, acute, spreading above. Receptacle convex or hemispherical, naked 

 or fimbrillate. Rays wedge-shaped, palmately 3-lobed. Corolla of the disk 

 with subulate lobes. Aehenia top-shaped, hairy. Pappus of 6-10 membrana- 

 ceous 1-nervcd awned scales. — Pubescent branching herbs, with alternate leaves, 

 and solitary heads of yellow or purple flowers terminating the branches. 



\. G. lanceolata, Michx. Stem (l°-2°) with long and slender branch- 

 es ; leaves narrow-lanceolate, mostly entire, sessile, the lowest narrowed at the 

 base; rays yellow, sometimes wanting ; disk-flowers purple; receptacle naked; 

 scales of the pappus 7-9. — Dry pine barrens, Florida to South Carolina. 

 July - Sept. 



57. PALAFOXIA, Lagasca. 



Heads many-flowered ; the, ray-flowers pistillate, or none. Scales of the ob- 

 conical involucre in 2 rows, membranaceous at the summit. Receptacle flat, 

 naked. Aehenia slender, 4-angled, tapering at the base. Pappus of 6-15 

 membranaceous denticulate scales, pointed by the prolonged rigid midrib. — 

 Herbs or shrubs, with narrow entire leaves, and heads of white or purple flow- 

 ers in a terminal corymb. 



1. P. integrifolia, Torr. & Gray. Stem ('2° high) branched above, 

 smoothish ; leaves lanceolate, rough ; the lower ones often opposite ; rays none ; 

 flowers purplish; scales of the pappus 8-9, linear-subulate. (Polypteris inte- 

 grifolia, Nutt.) — Dry pine barrens, Georgia and Florida. July- Sept. 



58. HYMENOPAPPUS, LIIe.it. 



Heads many-flowered ; the flowers all tubular and perfect. Scales of the in- 

 volucre (') - 12, oval or obovate, membranaceous, white. Receptacle naked. 

 Corolla slender. Aehenia top-shaped, 4-angled. Pappus of 1 12 - '20 short obtuse 



