Probably because they're not coconut palms. There are many species of trees (over 1500) generically called "palm trees," but only the coconut palm produces coconuts. The scientific name of the coconut palm is Cocos nucifera, which is essentially the Latin equivalent of "coconut bearer."
Even if they are actually coconut palms, they might not bear coconuts in Arizona. Coconut palms require very warm temperatures year-round, and considerable moisture; Arizona is a bit too far north, and mostly too dry, for them to grow well.
All palm trees are vascular plants. Some palm trees bear fruit such as the coconut palm tree and the date palm tree.
coconut king coconut Kitul
Coconut
No
Coconuts come from the coconut palm.
Some palm trees produce coconuts, which are the fruit of the coconut palm (Cocos nucifera). Additionally, other palm species produce dates, such as the date palm (Phoenix dactylifera). Palm trees can also yield oil, such as palm oil from the oil palm (Elaeis guineensis), and some varieties produce edible seeds or nuts.
Coconuts, and palm leaves for housing materials.
All palm trees bare fruit. The most common fruit is the coconut.
Coconut
coconut and bananas
In A Way Yes, One Because There Both Palm Trees, And No Because Coconuts Make The Tree Different.
Yes, they are the same thing. The coconut palm tree is a generic name for the palm tree species. There are many kinds of coconut palm trees, but the most famous ones are known as the Malayan Coconut Palm Tree and its Scientific name, or botanical name, is Cocos nucifera. : ) I placed a link below that talks about the Malayan Coconut Palm Tree in more detail.