perfoliate

 
Pronunciation: /pəˈfəʊlɪət/

adjective

Botany
  • (of a stalkless leaf or bract) extended at the base to encircle the node, so that the stem apparently passes through it.
  • (of a plant) having perfoliate leaves: perfoliate alexanders

Origin:

late 17th century: from modern Latin perfoliatus, from Latin per- 'through' + foliatus 'leaved'