Clockweed is a North American grown in sunny U.S. gardens, where it blooms through summer and fall. Its white flowers open on long, wiry stems and often turn pale pink as they age. It is also called white gaura.
Spider flower has leaves divided into several leaflets and a much denser cluster of flowers. Clockweed has undivided, narrow leaves and a loose wand of white or pink flowers.
Why they get mixed upBoth can grow tall in U.S. gardens and have airy pink or white flowers with long stamens.