Sonoma Valley, California
Quarryhill Botanical Garden
Although Asia has the largest and most diverse number of plant species on earth, almost 60,000 (25% of the world’s total) are threatened with extinction this century. Quarryhil’s 60-acre garden focuses on the conservation and documentation of the flora of Asia. Photo: Peter Clements; Family: Hydrangeaceae; Species: Dichroa febrifuga [ info ]