Interesting! Didn't know that. Is it true that there is some special benefit with foliar feeding then in that species.
Not sure about the foliar feeding.
This is a Desert Museum Palo Verde: Cercidium x "Desert Museum"
Monrovia says it was hybridized by Mark Dummett at the Arizona Sonoran Desert Museum. Combination of 3 different types of palo verde.
Ever wonder why the cambium is green in most species?
It does have a greenish cambium guessing because of the chlorophyll production in the bark.
As far as the foliar feeding it is a desert plant with very small leaves to cut back on water loss through transpiration. So I am not sure how effective foliar feeding would be.
It does have beautiful yellow flowers with red highlights.