I am so impressed that Pl@ntNet seems to have nailed the ID on this, that I have to post it for that alone. It rated its accuracy at 62%. I was thinking a columnar mango, based on the droopy leaves, but it's not even in the same family. Pl@ntNet found it named as Polyalthia longifolia. That is a synonym for Monoon longifolium, false Ashoka, or Mast tree. Presumably, this is M. longifolium var. pendula. Annonaceae family. Another synonym is Polyalthia longifolia 'Temple Pillar'. From India, Sri Lanka. This planting is in front of an apartment building in Chinatown. There seem to be fewer flowers around this year, except for Bougainvillea. But the Delonix regia, royal poinciana or flamboyant trees, on the last mauka (toward the mountains) block of River Street in Chinatown, have their reliable few flowers. This tree in the Bignoniaceae family has knock-your-socks-off colour and it's huge. It's at Foster Botanical Gardens, which is renovating the site to be ADA compliant, and there was no way to get close enough to try to get the name, if there even was a label. Of course, the gate staff had no idea (one said gold tree). I'm guessing Handroanthus, used to be Tabebuia. Maybe H. chrysantha; there is one of those on the other side of the garden. But there also exists H. chrysotrichus (Golden Trumpet Tree).