Helianthemum, the majority of the yellow shrubs here.  Also, Lotus scoparius, the other yellow flowered shrub in the photo, on the left, and further in the background, left and right, along with Artemisia californica, the greyish-green shrub, and some Lemonade Berry, Encelia california, and Mimulus behind them, not so evident in picture.  Also, one Dudleya edulis in right front corner.  Location immediately west of Salk Institute.