2007 Maui, Hawaii
 2006 Waterberg, South Africa
 2013 Aegina, Greece
 2006 Waterberg, South Africa
 2013 Marrakech, Morocco
 2006 Waterberg, South Africa
 2012 Marrakech, Morocco
 2007 National Botanical Garden, Washington, DC
 2005 Ik Kil Cenote, Mexico
 2007 National Botanical Garden, Washington, DC
 2003 Aosta Valley, Italy
 2003 Aosta Valley, Italy
 2009 St. Thomas, USVI
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