Image Citation: Greg Bartman, USDA APHIS PPQ, Bugwood.org
Day by day and area to area the appearance of the park can greatly and rapidly change, with very quick (yet sparce) downpours coming from what seems like out of no where, to high winds, to calm dry desert days that seem to have no end. Sometimes the plants look dry and possibly even dead but most are just waiting for the next rain to come to bring them back to life. Only 158 naturally occurring Palm Oases are found in North America, 5 of them are within the Joshua Tree National Parks boundaries. Generally occurring along fault lines where impermeable rocks force groundwater to the surface, a Oasis provides constant water to what would otherwise be a constantly dry and arid area.