HELENIUM, sneezeweed 
Helenium amarum (Raf.) H. Rock, bitterweed, bitter sneezeweed, 
yellow dog-fennel, p. 1595 
var. amarum 
H. autumnale L., sneezeweed, autumn sneezeweed, p. 1596 
var. autumnale 
var. canaliculatum (Lam.) Torrey & A. Gray [M: H. 
utumnale] (the validity of this variety has not 
been critically evaluated) 
var. parviflorum (Nutt.) Fern. [M: H. autumnale] (the validity 
of this variety has not been critically evaluated 
H. flexuosum Raf., sneezeweed, purple-headed sneezeweed, 
1595 
HELIANTHUS, sunflower 
gustifolius L., narrow-leaved sunflower, p. 1569 
H. annuus L., common sunflower (S: incl. var. lenticularis (Dougl.) 
teyerm., cv. nanus "Florepleno"] (Heiser et al., 1969), 
568 
Helianthus an 
p.3 
H. x cinereus Torrey & A, Gray, see named hybrids 
- decapetalus L., thin-leaved sunflower, pale sunflower, p. 1574 
57. 
om 8 
pleniflorus Wadm.] (Heiser et al., 1969), p. 1575 
incl. var. stenophyllus Torrey 
Gray, var. trachyphyllus Torrey & A. Gray] 
(Heiser et al., 1969), p. 1572 
H. x laetiflorus Pers., see named hybrids 
: maximilianii Schrader, Maximilian sunflower, p. 1572 
iencnen Pe & A. Gray, small wood sunflower, 
p. 
H. mollis Lam., ashy sunflower [S: incl. 
(Heiser et al., 1969), p. 157 
occidentalis Riddell, p. 1570 
SSp. occidentalis 
me i 
f. flavidus Steyerm.] 
1 
a 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
