Hablitzia

About

Hablitzia tamnoides, or Caucasian spinach, the sole species in the genus Hablitzia, is an edible herbaceous perennial plant, native to the Caucasus region. It is in the family Amaranthaceae and the subfamily of Betoideae. It is related to the genus Beta, but unlike Beta, it is a vine. It is also likely one of the longest lived plants in its family - one plant growing in Norrtälje, Sweden is reported to be over 50 years old.

Summary from Wikipedia