4i6 



COMPOSITAE. 



[Vol. III. 



3. Rudbeckia hirta L. Black Eyed Susan. 

 Yellow Daisy. (Fig. 3885.) 



J\udheckia liiria I,. .Sp. PI. 9117. 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-nerved, 2'-7' long, Yi'-i' wide, the upper 

 sessile, narrower, acute or acutisU; heads common- 

 ly few or solitary, 2'-4' broad; rays 10-20, orange, 

 rarely darker at the base; bracts of the involu- 

 cre very hirsute, spreading orreflexed, 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 Territorj', 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.) 



Kiidbeckia Brittonii Small, Mem. Torr. Club, 



4: 130. ■894. 



Stem stout, hispid, erect, i J^ °-i y^ ° 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. 38S7.) 



Rudbeckia ftilgida Ait. Hort. Kew. 3: 251. 17S9. 



Perennial; stem hirsute, or strigose-pubescent, 

 slender, sparingly branched or simple, l°-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-uerved, 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"-S" 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. .\ug.-Oct. 



