Turnera ulmifolia, Yellow Buttercup, Yellow Alder
This yellow flower glows against the plant’s deep green foliage. This beauty lasts for only a day but blooms sporadically all year long. Turnera ulmifolia is a native to the West Indies and Mexico; a perennial, dense, compact shrub that reaches 2 1/2 feet in height. Grows well in containers and can be brought indoors for the winter in cold climates.