Helianthus tuberosus and Sunflower

Helianthus tuberosus noun - Tall perennial with hairy stems and leaves; widely cultivated for its large irregular edible tubers.

Sunflower and Helianthus tuberosus are semantically related. In some cases you can use "Sunflower" instead a noun phrase "Helianthus tuberosus".

Sunflower noun - Any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays.

Helianthus tuberosus and sunflower are semantically related. Sometimes you can replace phrase "Helianthus tuberosus" with "Sunflower", this terms are similar.