238 coMPOSiTiE. (composite rA:aiLy.) 



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

 mcntose ; leaves ovate or ovate-lanceolate, inegularly serrate or siniuite-lobed, 

 tapering intowinged petioles, rough above, downy beneatli ; corymbs eyinose ; 

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

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



55. FLAVERIA, Juss. 



Heads few-ilowered, discoid, or with a single pistillate ray. Involucre of 3-5 

 oblong nearly equal scales, lleceptacle 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, smoothi.sli ; 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 many-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-lol)ed. Corolla of the disk 

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

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

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



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

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

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

 scales of the pappus 7-9. — Di-y 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 6-12 

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

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

 ers in a terminal coi^j'mb. 



1. P. integrifolia, Torr. & Gray. Stem {2° higli) branched above, 

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

 flowers puqilish ; scales of the pappus 8-9, linear-subulate. ( Poly pteris inte- 

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



58. HYMENOPAPPUS, L'llerit. 



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

 volucre 6-12, oval or olioviitc, mcmbramiceous, white. Receptacle naked. 

 Corolla slender. Aehenia toj)-8haped, 4-angled. Pappus of 12- 20 short obtuso 



