The admirable qualities of Jacarandas don't simply end with their jaw-dropping clusters of purple flowers. They are practical as much as they are beautiful. Jacaranda trees are great shade trees. Their fern-like foliage and the graceful, wide canopy provides filtered shade during the warmest seasons of the year.The extract also acts against Staph. tradition the flowers, leaves and bark are used to ease neuralgia and varicose veins. qualities that treat leukemia. Hot Jacaranda leaf baths treat wounds and skin infections and the tree also helps in the treatment of acne.