Koa trees in lower puna

[Les C]

While there is only one Koa species, there seems to be a difference with localized types which is not a subspecific (race) difference. But for a while, State agencies were gathering koa seeds from different islands for their own seed bank, and they were mixing them together. This was discovered to be unwise. Apparently, there was a difference in how well a koa seed would do when planted on a different island. There might also be a difference between a low elevation type and a high elevation type. It's a relatively fast growing tree, although probably not fast enough from a resource crop POV.