155 
Oenothera triloba Nutt., stemless evening primrose, p. 1106 
O. villosa Thunb., common evening primrose [S, M: O. biennis L.] 
(Dietrich and Raven, 1976; Raven et al., 1979), p. 1101 
ssp. villosa [S: O. biennis var. canescens Torrey & A. Gray, 
var. hirsutissima A. Gray; M: O. biennis var. canescens 
Torrey & A. Gray] (Munz, 1965; Dietrich and Raven, 
1976; Raven et al., 1979) (note that the presently 
accepted subspecies are based upon different 
morphological characters than were the varietal 
epithets used in most previous midwestern floras; there 
is little correlation between the nomenclatural 
synonymy in this group and the actual determinations 
for Missouri specimens, using modern nomenclature) 
STENOSIPHON 
Stenosiphon linifolius (Nutt.) Heynh., p. 1107 
OROBANCHACEAE, broomrape family 
EPIFAGUS, beechdrops 
Epifagus virginiana (L.) W. P. C. Barton, p. 1374 
OROBANCHE, broomrape 
Orobanche ludoviciana Nutt. (note that according to Collins 
(1973), the type of O. ludoviciana represents the 
western species that otherwise has been called O. 
multiflora Nutt.; a new name for our northeastern 
species unfortunately has not been published), p. 1374 
*O. multiflora Nutt. (Smith, 1990) (see note above) 
O. uniflora L., one-flowered cancer-root, small cancer-root, 
p. 1374 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
