piggyback plant piggyback plant /ˈpɪɡiˌbæk plænt/

noun

1. Vigorous perennial herb with flowers in erect racemes and having young plants develop at the junction of a leaf blade and the leafstalk  ( pickaback plant , piggyback plant , Tolmiea menziesii , youth-on-age )
   vigorous perennial herb with flowers in erect racemes and having young plants develop at the junction of a leaf blade and the leafstalk