I always encourage people to slow down when they visit Disneyland, especially when taking their first few steps under the train tunnel onto Main Street, U.S.A. There’s too much you’ll miss if you’re racing from attraction to attraction. For to set foot in Disneyland is to be guided by many an invisible hand. Winding, circular and branching paths not only direct guest flow, but create the tone for the experience. The sensation is meant to evoke one of lushness and grandeur, to envelope oneself in a garden as much as a land of play. A principal in defining the feel of Disneyland — and an influence felt today in all meticulously designed theme parks — is master landscape artist Ruth Shellhorn. A South Pasadena native, her work for decades often went overlooked, spoken of in the shadows of brothers Jack and Bill Evans, horticultural experts who also played an instrumental role in the development of the modern theme park as homes to arboretum-worthy spaces. It was Shellhorn, however, who used plants and trees to unify …