I'll keep this general, in case others want to contribute from other Hawai'i locations, though the only other location is supposed to be Waimea on Hawai'i island. The ones here are from the town of Wahaiwa on Oah'u. This seems to be the only place that's high enough that it gets the requisite cold followed by warmth that the flowers require, and there are only a few cherries that can deal with the very short period of cold in this area. The original cherries in town are supposed to be from Okinawa, and the next group as well. It seems the rest of the cherries in town were seedlings from these original imports. I can't find the article that said they were Prunus campanulata, which is kanhi-zakura, Formosan cherry. I think I read that there was another kind as well, but I can't find that. These all look similar enough to me for a species cherry. The flowers are around 2cm in diameter, larger flowers than on 'Okame', the P. campanulata hybrid that we have in Vancouver. Here are trees from the Hongwanji Mission on California Street. Well, all my locations were on that street. These were at the Wahiawa Fresh Water State Park. I have one other location, will have to be a separate posting.