What does "helianthus giganteus" mean?

very tall American perennial of central and the eastern United States to Canada having edible tuberous roots

What is a synonym for "helianthus giganteus"?

Common synonyms include: giant sunflower, indian potato, tall sunflower.

Rare ·Advanced level

Noun

1
very tall American perennial of central and the eastern United States to Canada having edible tuberous roots wordnet