Mary Tipping has held the position of Curator and Plant Recorder at the Scott Arboretum & Gardens at Swarthmore College in Swarthmore, Pennsylvania since 2015 after working as the Horticulturist at the Henry Schmieder Arboretum of Delaware Valley University in Doylestown, Pennsylvania.  In her current position, she is responsible for curating, recording, mapping, and labeling a vast array of plant collections, which encompass over 11,500 woody plants and thousands of herbaceous plants. 

She is an ISA Certified Arborist® and the Philadelphia Flower Show Nomenclature Chairman.  Her plant passions include oaks, beeches, Stewartia, conifers, witch-hazels, deciduous azaleas, and ferns, just to name a few.

Ethan Kauffman is the first director of Stoneleigh: a natural garden, where he has led the transition from a private estate to a public garden over the last 8 years. He developed his love of the natural world by exploring the Susquehanna River Hills in Southeastern Pennsylvania. He cultivated his horticultural perspective over two decades of gardening in the Deep South, including as director of Moore Farms Botanical Garden, where he also led the transition from a private pleasure garden to a public botanical garden.  Drawing on influences from both regions, he enjoys creating a garden experience at Stoneleigh that inspires others to garden for beauty, biodiversity, and the health of our planet.