Sohnreyia excelsa
Sohnreyia excelsa, synonym Spathelia excelsa, commonly called the maypole tree, is one of a genus  of palmoid trees, or Corner Model Trees, (architecturally palm-like in gross form) belonging to the Citrus, or Rue  family (Rutaceae). It is native to the rainforests of the  Amazon basin, and was discovered in 1911 by botanical explorer Dr. Ernst H.G. Ule. S. excelsa is a monocarp producing an immense thyrse  high and about  wide; the second largest inflorescence of any dicot (after Harmsiopanax ingens). The palmlike  leaves are once-pinnate and up to  in length. References

Rutaceae
Flora of the Amazon