Kelaidis, Panayoti: - Panayoti Kelaidis represents Denver Botanic Gardens in educational, professional, and promotional endeavors as an expert in horticulture, science, and art. He has traveled to South Africa on seven occasions over the last twenty years. He is the recipient of the American Horticultural Society's 2009 Liberty Hyde Bailey Medal and the 2000 Arthur Hoyt Scott Medal from Swarthmore College.