This park has some of the best views in San Francisco, but don’t overlook the wonderful wildflower display that carpets the grasslands each spring. Among the flowers, you may see here are checkerbloom, California poppy, footsteps of spring, Douglas iris, mule’s ears, and Johnny jump-up, a sensitive species that is the only host plant for the callippe silverspot butterfly. Also look for anise swallowtail, a big yellow butterfly with black shoulders that frequents San Francisco’s hilltops.