plumbago

例句：

1. 1. The plumbago tree is a tropical plant that grows in the Caribbean.
   棕榈树是一种生长在加勒比海的热带植物。
2. 2. He was sent to prison for his involvement in the plumbago scheme.
   他因参与棕榈计划而被送进监狱。
3. 3. The plumbago industry is a major source of income for many people in the region.
   棕榈产业是该地区许多人的主要收入来源。