There are many who say that Panayoti Kelaidis has changed Western gardening more that anyone in recent times. There is no doubt that his influence on gardening and plant selection is substantial. As an expert in horticulture, science and art, the Senior Curator and Director of Denver Botanical Gardens Outreach, has traveled extensively and spoken throughout the world. He is past president of the Rocky Mountain Chapter of the American Rock Garden Society
and the American Penstemon Society. In 2000, he was the recipient of the Arthur Hoyt Scott Medal from Swarthmore College, generally considered the highest honor in American Horticulture. Panayoti almost singlehandedly introduced the genus Delosperma to general horticulture.