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.

Nelson Zamora

Herbarium of the National Institute of Biodiversity of Costa Rica

Nyree Zerega

Director and Senior Lecturer, Plant Biology & Conservation Graduate Program, Herbarium Director and Plant Systematist

Northwestern University &Chicago Botanic Garden