I saw this Golden Shower tree (Cassia fistula) on the way to go swimming at Mauna Lani and, afterwards, went back to take photos. The mass of yellow flowers is typical for the tree. This species was crossed with the Pink and White Shower tree to produce the Rainbow Shower Tree.
Posted for Terri’s Flower Hour. See more responses here.
Graham's Island 
Truly a beautiful tree with those gorgeous blossoms, Graham. Has a bit of that hanging vine look, too. How long do the flowers last,
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