The sign was attached to the fence bordering the roof garden. It described (in part): "Oaks are a resilient and varied genus that has colonized all corners of the globe. There are more then 25 native California oak species, which are found throughout the different regions of the state, from dry deserts to lush mountains and forests."

Yellow wildflowers bloomed in a tiny meadow surrounding the oak trees.

A tall California Oak tree grew next to a path that connected the roof garden to an office building.