Yellow, five petaled, buttercup-like flowers bloom prolifically on the buttercup bush, also commonly called Cuban buttercup or yellow alder. Growing buttercup bushes provides continued blossoms in USDA gardening zones 9-11. Botanically called Turnera ulmifolia, this spreading ground cover or small shrub brightens up bare spots in the landscape with flowers that bloom in the mornings and last most of the day.
It is sometimes cultivated for its medicinal uses. Invasive in Australia, Hawaii, Puerto Rico, the Virgin Islands, Singapore, Malaysia, Indonesia, and on several islands in the Pacific Ocean.