416 



COMPOSITAE. 



[Vol. HI. 



3. Rudbeckia hirta L,. Black Eyed Susan. 

 Yellow Daisy. (Fig. 3885.) 



Rudbeckia Jiiiia L. Sp. PI. 907. 1753. 



Hirsute or hispid throughout, biennial or some- 

 times annual; stems simple or sparingly branched, 

 often tufted, i-3 high. Leaves thick, sparingly 

 serrate with low teeth, or entire, lanceolate or ob- 

 long, the lower and basal ones petioled, mostly ob- 

 tuse, 3-5-uerved, 2 / -7 / long, Yz'-i' wide, the upper 

 sessile, narrower, acute or acutish; heads common- 

 ly few or solitary, i f -\' broad; rays 10-20, orange, 

 rarely darker at the base; bracts of the involu- 

 cre very hirsute, spreading or refiexed, much shorter 

 than the rays; disk globose-ovoid, purple-brown; 

 chaff of the receptacle linear, acute or acutish, hir- 

 sute at the apex; style-tips acute; pappus none. 



In fields, Quebec to western Ontario and the North- 

 west Territory, south to Florida, Colorado and Texas. 

 Native only on the western prairies. Widely distribu- 

 ted in the east as a weed. Called also Nigger-head, 

 Golden Jerusalem, Ox-eye Daisy. May-Sept. 



4. Rudbeckia Brittonii Small. Brit- 

 ton's Cone-flower. (Fig. 3886.) 



Rudbeckia Brittonii Small, Mem. Torr. Club, 



4: 130. 1894. 



Stem stout, hispid, erect, \%-2y 2 high, sim- 

 ple, grooved, leafy, at least below. Leaves ser- 

 rate or crenate-serrate, strigose-pubescent, the 

 basal ones ovate to ovate-lanceolate, 3 / -4 / long, 

 obtuse, long-petioled; stem leaves obovate to 

 oval, often with a lateral lobe, the petioles 

 wing-margined; uppermost leaves often ovate- 

 lanceolate, sessile, cordate; bracts of the invo- 

 lucre foliaceous, often i / long or more; head 

 2 / -3 / broad; rays about 12, 2-lobed; outer 

 chaff oblanceolate, the inner linear, acute, 

 purple-tipped, fringed with jointed hairs; 

 style-tips slender, acute. 



In woods, mountains of Pennsylvania to Vir- 

 ginia and Tennessee. May-July. 



5. Rudbeckia fulgida Ait. Orange Cone- 

 flower. (Fig. 3887.) 



Rudbeckia fulgida Ait. Hort. Kew. 3: 251. 1789. 



Perennial; stem hirsute, or strigose-pubescent, 



slender, sparingly branched or simple, i-3 high. 



Leaves firm, entire, or sparingly serrate with distant 



teeth, more or less hirsute or pubescent on both 



sides, the basal and lower ones oblong or spatulate, 



obtuse, 2 / -4 / long, 3-nerved, narrowed into margined 



petioles, the upper lanceolate or oblong-lanceolate, 



sessile, or slightly clasping at the base; heads few, 



i / -i^ / broad; bracts of the involucre oblong or 



lanceolate, 3 // -8 // long; rays 10-15, linear, bright 



yellow, or with an orange base; disk globose or 



globose-ovoid, brown-purple, 5 // ~7 // broad; chaff of 



the receptacle linear-oblong, obtuse, glabrous, or 



nearly so at the summit; pappus a minute crown. 



In dry soil, New Jersey and Pennsylvania to Georgia, 

 west to Missouri and Texas. Aug. -Oct. 



