Genus 60. ] 



THISTLE FAMILY. 



417 



6. Rudbeckia spathulata Michx. 



Spatulate-leaved, or Flat-headed 



Cone-flower. (Fig. 3888.) 



Rudbeckia spathulata Michx. Fl. Bor. Am. 2: 144. 1803. 



Perennial; stem slender, simple, or little branched, 



finely strigose-pnbescent, i-3 high. Leaves ap- 



pressed-pubescent on both sides, obovate, oval, or 



spatulate, the lower 2'-\' long, i / -i}4 / wide, or the 



basal ones sometimes nearly orbicular, obtuse or ob- 



tusish, denticulate, narrowed into margined petioles; 



upper leaves smaller, sessile, mostly entire, oblong 



and acute; heads few, or solitary, i'-iJ^' broad; 



bracts of the involucre short, at length reflexed; 



disk depressed-globose or ovoid, about 5" broad; 



rays S-12, oblong, yellow, mostly orange at the 



base; chaff of the receptacle obtuse; style-tips 



obtuse; pappus a short-toothed crown. 



In dry woods, Chester Co., Penn., to Tennessee and 

 Florida. Aug. -Sept. 



7. Rudbeckia speciosa Wenderoth. 

 Showy Cone-flower. (Fig. 3889.) 



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

 Rudbeckia speciosa Wender. Ind. Sera. Hort. Marb. 

 1828. 



Perennial, more or less hirsute or hispid; stem 

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

 petioled, 2 / ~5 / long, i / -2 / wide, dentate with low 

 teeth, acute or sometimes acuminate, 3-5-nerved; 

 stem leaves sessile or partly clasping, or narrowed 

 into broad margined petioles, laciniate or sharply 

 serrate, lanceolate, 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, \'-\% f long, bright 

 yellow, usually orange at the base; disk depressed- 

 globose, 5 // -8 // broad, brown-purple; chaff of the 

 receptacle obtusish or acute, ciliate or naked; pap- 

 pus a short crown. 



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

 bama and Arkansas. Aug.-Oct. 



8. Rudbeckia laciniata L,. Tall, or 

 Green-headed Cone-flower. (Fig. 3890.) 



Rudbeckia laciniata L- Sp. PI. 906. 1753. 



Perennial; stem much branched, glabrous, or 

 nearly so, 3-i2 high. Leaves rather thin, mi- 

 nutely pubescent on the margins and upper surface, 

 broad, the basal and lower ones long-petioled, often 

 i wide, pinnately 3-7-divided, the segments vari- 

 ously toothed and lobed; stem leaves shorter-peti- 

 oled, 3-5-parted or divided, the uppermost much 

 smaller, 3-lobed, dentate or entire; heads several or 

 numerous, 2^2 / ~4 / broad; rays 6-10, bright yellow, 

 drooping; bracts of the involucre unequal; chaff of 

 the receptacle truncate and canescent at the apex; 

 disk greenish-yellow, at length oblong and twice as 

 long as thick or longer; pappus a short crown. 



In moist thickets, Quebec to Manitoba and Montana, 

 south to Florida and New Mexico, Called also Thim- 

 ble weed. July-Sept. 



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