sentences:  (Bill) Williams, who established the Eastwoodhill Trust Board in 1975 as a charitable trust, donating the arboretum to the trust to safeguard it for future generations.Of all the arboreta of the Southern Hemisphere, Eastwoodhill Arboretum is said to have the largest collection of trees of the temperate climate zone of the Northern Hemisphere.It includes some 4,000 different trees, shrubs and climbers, including 170 species currently on the IUCN world endangered species list.