ABSTRACT
L.) and the sunflower (
Helianthus annuus
L.). The Jerusalem artichoke is cultivated as a vegetable, fodder crop, and a source of inulin for food and industrial purposes, while the sunflower is grown as an oilseed crop. Both species are also noteworthy in that, of the diverse cross section of crops that make up the backbone of agriculture in North America, they are the only crops that were domesticated in prehistoric times in what is now the U.S. (Heiser, 1978). In addition, several other species and hybrids are either currently or beginning to be used for ornamental purposes, including
H. annuus
,
H. argophyllus
T.&G.,
H. debilis
Nutt.,
H. decapetalus
L.,
H.
