Global Tree Specialist Group Members

The IUCN/SSC Global Tree Specialist Group (GTSG) has over 80 expert members from botanic gardens, herbaria, universities and both governmental and non-governmental organisations.  Find out more about the specialists who help to inform the conservation work we carry out.

Tiberius Jimbo2

Tiberius Jimbo

Tropical Plant Identification

Plant Biologist/Botanist, Lae National Herbarium, Forest Biology Program, Papua New Guinea Forest Research Institute


Dr. Peter Jorgensen

Missouri Botanical Garden, USA


Dr Kang Wang

Fraxinus, Virburnum, woody plants conservation

Beijing Botanical Garden


Matthew Kaproth

Species functional and ecophysiological trait variation across environmental gradients

Minnesota State University Mankato

Gregor Kozlowski  2

Prof. Gregor Kozlowski

Conservation biology and biogeography of relict trees, particular focus on Juglandaceae and genus Zelkova (Ulmaceae)

University of Fribourg, Switzerland

GregLeach - Copy

Dr. Greg Leach

Rare and threatened flora of the Northern Territory

Charles Darwin University