RATIBIDA, prairie coneflower 
Ratibida columnifera (Nutt.) Wooton & Standley, longhead prairie 
eflower, prairie coneflower, p. 1563 
f. columnifera 
f. pulcherrima (DC.) F 
R. pinnata (Vent.) rine sraphea prairie coneflower, drooping 
coneflower, 
+R. tagetes (E. James) Seaal shortray prairie coneflower, 
p. 1653 
RUDBECKIA, coneflower 
Rudbeckia fulgida Aiton, orange coneflower, p. 1 
var. sullivantii (C. L. Boynton & Beadle) aie [S: R. fulgida 
var. speciosa (Wender.) Perdue] (Cronquist, 1945a) 
var. umbrosa (C. L. Boynton & Beadle) Cronq. 
R. grandiflora (D. Don) DC., rough coneflower, p. 1557 
var. grandiflora 
R. hirta L., black-eyed Susan, p. 1558 
var. pulcherrima Farw. (note that S: also discusses f. flavescens 
Clute and f. homochroma Steyerm. and M: includes f. 
flavescens, both corolla-color variants, but th 
disposition of gu any among the varieties has not 
n examined critically) 
R. laciniata L., goldenglow, ino coneflower, p. 1557 
var. laciniata 
¢R. maxima Nutt., p. 1558 
R. missouriensis Engelm., Missouri coneflower, Pp. 1559 
R. subtomentosa Pursh, sweet coneflower, p. 1557 
f. craigii (Sherff) Fern 
f. subtomentosa 
R. triloba L., brown-eyed Susan, p. 1560 
var. triloba 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
