Pine cone - Zundert
Caribbean - Palm tree
Leaf - Heerenveen
Floriad Amsterdam 1982
Tree - Oak - Bergeijk
400 Years Hortus Botanicus Leiden 1590-1990
Pine cone - Boskoop
Fungal Cultures - Baarn
30 Years Pendulum Forest - Harderwijk
Leafs - Boskoop
Flower - Protea
Forest - Congo
Tree - Publisher
Edelweiss
Horticultural
Flower - Rose - Tree
Palm tree
Plant extracts
British Ecological Society
