This is a painting of a desert wash in the southern part of Joshua Tree National Park.
This area spawns glorious wildflower color in the spring (if enough rain has fallen at the right time), and even washes -- "rivers" that are dry most of the time -- features bursts of color. In this case, chuparosa shrubs produce red blooms that are much loved by hummingbirds. The smoke tree will bloom -- if it does -- later, most likely in June.
The size of this painting is 5" x 7"/12.7cm x 17.8cm.