HO SYNGENESIA.— FRUSTRANEA. 



scabrous, obscurely triply-nerved, subsessile, at- 

 tenuate at each end, ciliate at the base ; scales of 

 the calyx lanceolate, ciliate. 

 HAB. Low grounds. Aug. — Sept. U . Stem 5 — ■ 

 6 ft. high, subscab. ; pan. loose, few-Jl. 



9. H. decapetalus : leaves ovate, acuminate, remotely 



serrate, triply-nerved, scabrous ; scales of the ca 

 lyx lanceolate, subequal, subciliate ; rays 10 — 12. 

 IIAB. Rocky woods. Aug. U. Stem 4 — b ft. 

 high ; Jlowers large. 



10. H. multiflorus : leaves triply-nerved, scabrous: 

 lower ones cordate ; upper ovate ; rays inany- 

 flowered ; scales of the calyx lanceolate. 



IIAB. Rocky woods. Aug. — Sept. U . Stem and 

 pedunc. scab. ; rays very num. 



500. RUDBECKIA. Composite 



* Calyx imbricate ; chaff mucronate. 



1. R. purpurea : scabrous; lower leaves broad-ovate. 



narrowed at the base, remotely toothed ; cauline 

 ones lanceolate-ovate, nearly entire, acuminate 

 at each end ; florets of the ray very long, deflexed. 

 bifid. 

 HAB Mountains. June — July. U. Stem 4 ft. 

 high ; fl. large ; rays purp. ; disk brown. 



* * Calyx subequal ; chaff unarmed. 



2. R. pinnata : leaves all pinnate ; lower segments 



sometimes 2-parted ; pappus entire ; stem sulcate. 

 hispid. 

 HAB. Pennsylvania. July — Oct. U. Fl. large, 

 yell. ; rays long, reflex. ; disk jyirp. 



3. R. digitata : lower leaves pinnate ; segments pin- 



natifid ; upper ones simple, pinnate, the highest 

 3-cleft ; pappus crenate ; stem smooth. 

 HAB. Mountains. Aug. U . Stem b— 6 ft. high: 

 leav. thin; fl. yell. ; pap. subtruncate. 

 U R. laciniata : lower leaves pinnate; segments 3- 

 lobed ; upper ones ovate ; pappus crenate ; stem 

 smooth. 

 HAB. Swamps. Aug. U . Stem 5—8 ft. high 

 lower leav. 3-foliate ; fl. yell. 



