plumbago
/ˈplʌmbəɡoʊ/ or /ˌplʌmˈbeɪɡoʊ/Definitions
1. noun
A plant of the genus Plumbagella or Plumbago, especially P. auriculata, a flowering evergreen shrub native to Africa and Asia, with blue flowers and leaves.
“The garden was filled with the beautiful blue flowers of the plumbago shrub.”