Best known for her work on the Bullock’s department stores and Fashion Square shopping centers, projects that redefined the commercial genre as a relaxing and entertaining activity, and for her work with Walt Disney on the original design of Disneyland, Shellhorn also designed a landscape master plan for the University of California at Riverside and other campuses, as well as a number of private gardens and estates for movie stars and the business and financial leaders of the Los Angeles region. She created landscape designs that refined the indoor-outdoor living concept, and she developed a palette of plant materials that perfectly expressed the exuberance and optimism of the post-war era, which became known as “the Southern California look.”