228 COMPOSITE. (COMPOSITE FAMILY.; 



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

 disk yellowish, ovate or eonical ; rays large, drooping ; chaff of the receptacle 

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

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

 August. Leaves large. Rays 1'- 2' long. 



7. R. heterophylla, Torr. & Gray. Pubescent ; stem corymbose 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 ; chaff 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 : 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. 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' - 6' long. 



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

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



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-toothed or none Otherwise like Rudbeckia. Perennials. Leaves 

 pinnately divided. Rays large, drooping, yellow. 



1 . L. piunata, Torr. & Gray. Rough with short appressed hairs ; stem 

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

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

 2-toothcd. (Rudbeckia tomentosa, Ell.) Dry soil, West Florida, Georgia, 

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



47. HELIANTHUS, L. SUNFLOWER. 



Heads many-flowered ; the ray-flowers neutral ; those of the disk tubular and 

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



