Genus 6o. ] 



THISTLE FAMILY. 



417 



6. Rudbeckia spathulata Michx. 



Spatulate-leaved, or Flat-headed 



Cone-flower. (Fig. 3888.) 



Rudbeikia spalhulala Michx. Fl. Bor. .-Vm. 2: 144. 1803. 



Perennial; stem slender, simple, or little branched, 

 finely strigose-pubescent, i°-3° high. Leaves ap- 

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

 spatulate, the lower I'-i,' 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'-ij4' broad; 

 bracts of the involucre short, at length reflexed; 

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

 rays 8-1 2, oblong, yellow, mostly orange at the 

 base; chaff of the receptacle obtuse; style-tips 

 obtuse; pappus a short-toothed crown. 



In dr\- 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. Sem. Hort. Marb. 



1828. 



Perennial, more or less hirsute or hispid; stem 

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

 petioled, 2'-^' 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, I'-iyi' long, bright 

 yellow, usually orange at the base; disk depressed- 

 globose, 5"-S" 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. 1733. 



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 

 \° 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-ro, 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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