Jerusalem artichoke
Helianthus tuberosus
It is nearly impossible to distinguish Jerusalem artichoke from annual sunflowers based on above-ground growth. Jerusalem artichoke has a coarse, 5- to 10-foot tall stem, large leaves with a rough upper surface, and bright yellow sunflower-like flowers. However, Jerusalem artichoke can be easily distinguished from annual sunflowers by its below-ground growth that includes fleshy tubers resembling thin, knotty potatoes. Reproduction of Jerusalem artichoke is by seeds, rhizomes (horizontal underground stems), and tubers.
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