GENUS 61. 



THISTLE FAMILY 



4. Rudbeckia Brittonii Small. Britten's 

 Cone-flower. Fig. 4445. 



R. Brittonii Small, Mem. Torr. Club 4: 130.. 1894. 



Stem stout, hispid, erect, ii-2i high, simple, 

 grooved, leafy, at least below. Leaves serrate 

 or crenate-serrate, strigose-pubescent, the basal 

 ones ovate to ovate-lanceolate, $'-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 involucre foliaceous, often 

 i' long or more; head 2'-$' 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, Pennsylvania to Virginia and Tennessee. 

 May-July. 



5. Rudbeckia fulgida Ait. Orange or Bril- 

 liant Cone-flower. Fig. 4446. 



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

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

 Rudbeckia missouriensis Engelm. ; Boynton & Beadle, 



Biltmore Bot. Studies 1:17. 1901. 

 R. palustris Eggert; Boynton & Beadle, loc. cit. 16. 1901. 



Perennial ; stem hirsute, or strigose-pubescent, 

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

 Leaves 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, oblong-lanceolate, ovate or obo- 

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

 few, i'-ii' broad; bracts of the involucre oblong or 

 lanceolate, 3"-8" long; rays 8-15, linear, bright yel- 

 low or with an orange base ; disk globose or globose- 

 ovoid, brown-purple, $"-7" broad; chaff of the re- 

 ceptacle linear-oblong, glabrous, or ciliate at the 

 summit; pappus a minute crown. 



In dry soil, New Jersey and Pennsylvania to Florida, 

 west to Missouri and Texas. Consists of races differing 

 in pubescence and leaf-form. Aug.-Oct. 



6. Rudbeckia umbrosa Boynton & Beadle. 

 Woodland Cone-flower. Fig. 4447. 



Rudbeckia umbrosa Boynton & Beadle, Biltmore Bot. 

 Studies 1 : 16. 1901. 



Pubescent, perennial; stems i3-34 tall, striate, 

 simple or branched. Leaves thin, the basal and 

 lower cauline ones ovate, 2'-4$' long, coarsely ser- 

 rate, rounded, truncate or cordate at the base, acute 

 at the apex, the upper stem leaves diminishing in 

 size, short-petioled or subsessile, narrower and less 

 toothed than the lower ; heads mostly several, showy ; 

 rays 8-12, yellow or orange-yellow, 7"-io" long; 

 bracts of the involucre oblong to linear-oblong, 

 5"-7i" long, pointed ; disk somewhat depressed, 5' - 

 7i" wide, dark purple; chaff broad, densely ciliate 

 at the apex; pappus coroniform. 



In moist soil and woodlands, Kentucky, Tennessee and 

 northwestern Georgia. Aug.-Sept. 



