228 COMPOSITE. (composite family.) 



pinnatifitl ; the middle ones 3-5-parted; the uppermost often undivided, toothed; 

 disk yellowish, ovate or conical ; ravs large, drooping; chaff of the receptacle 

 truncate, pubescent at the apex, about as long as the 3-anglcd achenia. (R. digi- 

 tata. Mill. R. laevigata, Pursh.) — Swamps, Florida, and northward. July and 

 August. — Leaves large. Kays 1' -2' long. 



7. R. heterophylla, Torr. & Gray. Fuhcsccnt ; stem corymhosc above ; 

 leaves coarsely serrate, rough above, tomentose beneath ; the lowest orbicular- 

 cordate or 3-5-parted, on long petioles; the middle ones 3-lobed ; the upper- 

 most ovate, sessile and entire; disk globose, yellowish ; rays drooping ; chad' of 

 the receptacle acute ; achenia 3-sided. — Swamps, Middle Florida August. — 

 Stem 3°-4° high. Leaves and heads much smaller than in the preceding. 



* * Disk columnar, elongated : steins tall, simple. 



8. R. maxima, Nutt. Smooth ; leaves large, membranaceous, oval or 

 oblong, slightly toothed or entire, feather-veined, the lower ones petioled, the 

 upper clasping; head solitary, long-peduncled ; rays large, drooping. — Wet 

 pine barrens, West Florida and westward. August. — Stem 4° - 9° high. Low- 

 est leaves 8'- 12' long. Rays 2' long. 



9. R. nitida, Nutt. Smooth and shining ; stem tall, naked above ; leaves 

 rigid, oblong-lanceolate, slightly toothed or entire, 3-5-ribbed ; the lowest long- 

 petioled; the upper partly clasping, small ; rays large, drooping; disk brown. 



— Borders of .swampy thickets, Georgia, Florida, and westward. July. — Stem 

 3°- 5° high. Lowest leaves 4' - G' long. 



* # # Low r leaves opposite,: disk ovate, yellow : chaff of the receptacle cuspidate, 

 ribbed: achenia biconvex, striate, hairy, rounded at the apex : pappus nunc. 



10. R. ? Porteri, Gray. Rough with short scattered hairs; stem panicu- 

 lately branched ; leaves lanceolate, entire, narrowed at each end, fringed at the 

 base ; exterior scales of the involucre linear, as long as the disk ; the interior 

 shorter, resembling the chaff of the receptacle; rays 7-9, longer than the disk. 



— Stone Mountain, Georgia. — Stem 2° - 3° high. 



46. LEPACHYS, Raf. 



Scales of the involucre few and small. Chaff of the oblong or columnar 

 receptacle truncate and thickened at the apex. Achenia flattened and margined. 

 Pappus 2-toothcd or none Otherwise like Rudbeckia. — Perennials. Leaves 

 pinnately divided. Rays large, drooping, yellow. 



1. L. pinnata, Torr. & Gray. Rough with short appresscd hairs; stem 

 ftparingly branched; divisions of the leaves 3-7, lanceolate, acute, serrate or 

 entire ; disk yellowish, oval or oblong, shorter than the ray- ; pappus obscurely 

 2-toothcd. (Radbeckia tomentosa, Ell.)— Dry soil, "West Florida, Georgia, 

 and westward. July- Sept — Stem 3° - 4° high. Rays 2' long. 



47. HELIANTHUS, L. Sunflower. 



lb ads many-flowered ; the ray-flowers neutral ; those of the di-k tubular and 

 perfect Scales of the involucre imbricated in 3 or more rows, with or without 



