The blue-green bushes are rubber rabbitbrush, a fall-blooming plant. Its lighter color is common for desert plants, to help reflect heat.
Rabbitbrush is one of the first plants to re-establish after an area has been disturbed. Many rabbitbrush areas in the valley were once Joshua tree woodlands, which were cut down for farmland and then abandoned during a years-long drought a century ago. The desert takes generations to recover from disturbance.