Caesalpinia pulcherrima - Red Bird of Paradise
This showy desert bloomer is spectacular. The huge red and yellow flowers appear tropical, with long feathery stamens, amazing against the delicate ferny green foliage. But the plant is tough as nails.
Originally from Argentina, this desert beauty is much used to brighten drought-tolerant Southwest landscaping. It's tough and undemanding, happy in scorching sun or part shade, will tolerate the worst drought, and is hardy down to 5 degrees.
Easy to grow in zone 8-10, Red Bird of Paradise also makes a fine container plant elsewhere, perfect for a sunny window.