COMPOSITAE. 



Vol. III. 



7. Rudbeckia speciosa Wenderoth. Showy 

 ( bne-flower. i'ig. 444&- 

 Rudbeckia aspera Pers. Syn. 2: 477. 1807? 

 R, speciosa VVendler. tnd. Sem. Hort. Marb. 1828. 



Perennial, more or less hirsute or hispid; stem 

 branched above, i-4 high. Leaves firm, slender- 

 petioled, 2'-s' long, 1-2' wide, dentate with low teeth, 

 acute or sometimes acuminate, 3-5-nervcd ; stem 

 leaves sessile or partly clasping, or narrowed into 

 broad margined petioles, laciniate or serrate, lanceo- 

 late to ovate, acuminate, often 6' long, the uppermost 

 smaller and sometimes entire; heads several, 2'-3' 

 broad ; bracts of the involucre linear-lanceolate, 

 acute; rays 12-20. r'-ii' long, bright yellow, usually 

 orange at the base; disk depressed-globose, s"-8" 

 broad, brown-purple ; chaff of the receptacle obtusish 

 or acute, ciliate or naked; pappus a short crown. 



In moist soil, New Jersey to Michigan, south to Ala- 

 bama and Arkansas. Aug.-Oct. 



Rudbeckia Sullivantii Boynton & Beadle has been 

 separated from R. speciosa on account of its broader 

 leaves, larger disk-flowers and larger achenes. 



8. Rudbeckia grandifldra Gmelin. 



Large-flowered Cone-flower. 



Fig. 4449- 



Rudbeckia grandiflora Gmelin ; DC. Prodr. 5 : 



556. 1836. 



Perennial; stem 1F-3 tall, scabrous or 

 hispid throughout. Leaves mainly on the 

 lower part of the stem, very rough on both 

 surfaces, ovate-elliptic to lanceolate, 2.V-& 

 long, acute or acuminate at the apex, cu- 

 neate or more abruptly contracted at the 

 base, shallowly serrate or denticulate, the 

 petioles of the lower cauline and basal 

 leaves as long as the blades or longer; 

 heads large, solitary or few, showy ; rays 

 several, yellow, il'-li' long, drooping; 

 bracts of the involucre linear, acuminate ; 

 disk ovoid or ovoid-globose, i'-i' thick; 

 chaff obtuse, canescent ; pappus conspicuous, 

 crenate or toothed. 



On dry prairies, Oklahoma to Louisiana and 

 Texas ; introduced into Missouri. June-Aug. 



9. Rudbeckia maxima Nutt. Great Cone- 

 flower. Fig. 445- 



Rudbeckia maxima Xutt. Trans. Am. Phil. Soc. (II) 

 7: 354. 1S41. 



Perennial; stem 3-o tall, simple or branched 

 above, smooth, glaucous. Leaves oblong, oval, 

 or ovate, or pandurate, 2*'-8' long, mostly ob- 

 tuse, undulate, repand-denticulate or entire, the 

 upper sessile and partly clasping; heads large, 

 showy; rays several, yellow, 7"-2o" long; bracts 

 of the involucres linear or linear-lanceolate, 

 acute, short; disk cylindric to conic-cylindric, 

 1-2I' long; chaff abruptly short-pointed, pubes- 

 cent at the summit ; pappus conspicuous, den- 

 ticulate, accentuated at the angles. 



In moist soil, Missouri to Louisiana and Texas. 

 June-Aug. 



