located on a 3-acre (12,000-sq m) site, the arboretum is open daily from dawn to dusk and has some 1200 trees. of particular interest is a wide-ranging conifer collection as well as several rare plants, including "taiwania" and the "living fossil" "wollemia". the arboretum has a "jurassic park" section with flowering plants species dating back to the age of dinosaurs and another section for california native plants, with some 50 different species represented.