.E. (COMPOSITE FAMILY.) 24'J 



into a petiole ; disk roundish, purplish brown ; chaff of the receptacle acute, 

 hairy at the apex. Dry soil. July -August. Stem rigid, l-2 high. 

 Kavs longer or shorter than the involucre. 



4. R. bicolor, Nutt. Hirsute; stem mostly simple, l'-H' high; leaves 

 oblong, sessile, the lowest petioled; heads small; scales of the involucre 

 oblong; rays yellow, the lower half brownish purple. Georgia. An immi- 

 grant from the West. 



5. R. fulgida, Ait. Pubescence hirsute, spreading ; stem mostly branch- 

 ing, 2 high ; leaves narrowly or broadly lanceolate, tapering into a slender 

 petiole, slightly serrate, the upper sessile, or partly clasping ; heads long- 

 peduucled ; disk globose, ^' wide ; rays 10-14, lanceolate. Dry woodlands. 

 August -Sept. 



6. R. spathulata, Michx. Pubescence strigose, appressed ; stem l-2 

 high, often simple; leaves generally broader, the lowest contracted into 

 broadly winged petioles ; heads smaller; rays fewer (6-8) and broader, 6"- 

 8" long. Open woods in the upper districts. August- Sept. 



7. R. speciosa, Wenderoth. Hirsute; stem branching, 2 -3 high; 

 leaves oblong lanceolate, tapering at the base, serrate, and often coarselv 

 toothed, the earliest ovate, contracted iuto t a long (6' -10') slender petiole; 

 heads large, long-peduncled ; rays numerous, 1' long; disk globose, dark 

 purple. Rich soil in the upper districts. August -Sept. 



8. R. niollis, Ell. Stem villous, branching ; leaves oblong, obscurely- 

 serrate, sessile and partly clasping, soft-tomentose on both sides ; the lowest 

 somewhat spatulate ; scales of the involucre numerous, linear lanceolate, vil- 

 lous, reflexed, half as long as the (12-20) rays; disk brownish ; chaff of the 

 receptacle rather obtuse, tomeutose at the apex. Dry soil, Florida and 

 Georgia, August - ( >ct. Stem 2 - 3 high. 



0. R. Heliopsidis. Torr. & Gray. Rhizoma prostrate ; stem pubescent, 

 wii h few peduncle-like branches at the summit; leaves ovate or oval, slightly 

 serrate, obtuse, smoothish, .Vribbed, petioled ; scales of the involucre oblong, 

 shorter than the brownish purple suhglobose disk, and (10- 12) oblong-linear 

 rays ; chaff of the receptacle obtuse, pubescent at the apex. Low ground in 

 the upper districts of Georgia and Alabama. August - Sept. Stem 2 high. 

 H- -i Leai'es divided : gtn/t paniculately or con/i/iboselij branched. 



10. R. triloba, L. Biennial, rough-hairy ; stem much branched; lowest 

 leaves long-petioled, ovate or oval, simple, or with two small lateral lobes, 

 serrate; lower stem leaves 3-lobed ; the upper simple, sessile, often entire; 

 heads small, numerous; scales of the involucre narrow- lauceolate, shortei 

 than the rays; disk almost black ; chaff of the receptacle awl-pointed, smooth, 

 as long as the flowers. Dry ground along the mountains. August -Sept. 

 Stem 2 -4 high. 



Var. rupestris, Gray. Sparsely pubescent, stout ; lower leaves 3-parted ; 

 heads globular, f wide, rays orange-yellow. High mountains of North 

 Carolina, 



Var. pinnatiloba, Torr. & Gray. More slender; lower leaves mostly 

 pinnately 5 - 7-lobed ; involucral scales linear, acute. Dry woods, Mariana, 

 West Florida. August. 



