I have active collaborations with researchers at Chevron, City of Houston Parks Department, Clemson University, Fudan University, Henan University, Hauzhong Normal University, Jiangxi Agricultural University, Lanzhou University, Louisiana State University, Memorial Park Conservancy, Nanjing Agricultural University, Shell, Texas A&M University, Texas Parks and Wildlife, University of British Columbia, University of California-Irvine, University of Houston, University of Texas-Rio Grande Valley, USDA-ARS, and Wuhan Botanical Garden.