The bark of a palo verde tree is green because it's filled with chlorophyll. Unlike most trees, this plant gets a lot of photosynthesizing done through its bark. According to The Arizona Native Plant ...

The blue palo verde tree (Parkinsonia florida) is one of two native Arizona palo verde trees, the other being Foothills palo verde. Of the two, blue palo verde is larger and naturally grows in washes, ...

A reader asked the following questions about trees. No. 1: When hiking, I often see what appear to be several trees growing from a central trunk. What causes this? No. 2: At a local park an oak tree ...