Desert Botanical Garden is a 140-acre botanical garden located in Papago Park, at 1201 N. Galvin Parkway in Phoenix, central Arizona. Founded by the Arizona Cactus and Native Flora Society in 1937 and established at this site in 1939, the garden now has more than 50,000 plants in more than 4,000 taxa, one-third of which are native to the area, including 3…Desert Botanical Garden is a 140-acre botanical garden located in Papago Park, at 1201 N. Galvin Parkway in Phoenix, central Arizona. Founded by the Arizona Cactus and Native Flora Society in 1937 and established at this site in 1939, the garden now has more than 50,000 plants in more than 4,000 taxa, one-third of which are native to the area, including 379 species which are rare, threatened or endangered.