228 COMPOSITE. (composite family.) 



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

 djsk yellowish, ovate or eonkal ; rays large, drooping ; chaff of the receptacle 

 truncate, pubescent at the apex, about as long as the 3-angled achenia. (It. digi- 

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

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



7. R. heterophylla, Torr. &. Gray. Pubescent ; stem corymbose above ; 

 leaves coarsely serrate, rougli above, tomentosc 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 ; chaff of 

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

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



* * Disk columnar, elongated : stems 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. It. nitida, Nutt. Smooth and shining ; stem tall, naked above ; leaves 

 rigid, oblong-lanccolatc, 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' - 6' long. 



* * * Lower leaves opposite : disk ovate, yellow : chaff of the receptacle cuspidate, 

 ribbed: achenia biconvex, striate, hairy, rounded at the apex : pappus none. 



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

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

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

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



— Stone Mouutain, 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-tOOthed or none Otherwise like Rudbeckia. — Perennials. Leaves 

 piimatcly divided. Bays large, drooping, yellow. 



1. L. pinnata, Ton-. & Gray. Rough with short appre88ed bails; stem 

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



entire ; disk yellowish, oval or oblong, shorter than the rays ; pappus obxiirely 



3-toothed. (Rudbeckia tomentosa, A'//.) — Dry Boil, West Florida, Georgia, 



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



47. HELIANTHUS, L. Sunflower. 



Heads main llowered ; the ray -Mowers neutral ; those of the dl>k tubular and 



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



