Thanks, Junglekeeper. It's in the Euphorbiaceae family, not the Euphorbia genus as written in the article. Still, it's really surprising to me that it's in that family. A good reminder. I would definitely have touched the fruits and leaves if I'd seen it, though a webpage I read described a mother and daughter who had no effects until they took a small bite of the fruit. A guy in Honolulu stopped me from touching a plant (not the same plant as this) in his garden, saying it had milky sap that would irritate my skin, and my eyes, if I touched them, as his spouse did, so I was able to later ID it for him by looking up Euphorbiaceae.
Maybe 40 years ago, I walked under one during a light rain. US Virgin Islands, St Thomas. It was on the roadside in a heavily forested slope. I did not do it deliberately, but thought I recognized the leaves and tree from research as I passed. Either I didn't get any sap on me, or the rain drops didn't acquire any phorbol before hitting me. I was aware of the possibility of encountering manchineel before visiting the island. Later I asked at the hotel, and of course they strongly recommended in that affable island way that this was why I needed to take cabs or shuttles everywhere. As might be expected, they were more concerned about a negative reaction from me and didn't consider that I would be fascinated in the tree and local folklore. Also ran into a native datura in a nerdo-comical episode on Antigua. I love finding flora and fauna that I've read about but never seen before.