238 COMPOSITE. (composite FAillLV.) 



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

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

 tapering into fringed petioles, rough above, downy beneath; corymbs cymoae; 

 rays 3-4, oval, white; achenia 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. Involucre of 3-5 

 oblong nearly equal scales. Receptacle naked. Achenia 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 manv-flowcrcd ; 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. Achenia top-shaped, hairy. Pappus of G-10 membrana- 

 ceous 1-nerved awned scales. — Pubescent branching herbs, with alternate lcave9, 

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



1. G. lanceolata, Michx. Stem (1<>- 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; 

 Bcales 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 Bat, 

 naked. Achenia Blender, 4-angled, tapering at the base. Pappus of 6 -12 

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

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

 er- in a terminal corymb. 



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

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

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

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



58. HYMENOPAPPUS, L'Herit 



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

 volucre 6—12, oval or obovate, membranaceous, white. Receptacle naked. 

 Corolla slender. Achenia top-shaped, 4-angled. Pappus of 12- 20 shorl obtuse 



