Yellow Peppergrass (<i>Lepidium flavum</i>) at Red Rock Canyon State Park, California, in the Mojave Desert.  These are tiny flowers--the whole clump is just a couple of inches (or so) across.  If you view the image full size, the leaves have a sort of succulent look to them.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/54259492@N00">Tom Hilton</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/tomhilton/2340970684/">Red Rock Canyon Flowers</a>