Name of low-growing ground cover with bird-of-paradise looking flowers?

I'm looking for the name of a low-growing groundcover that has unique looking little flowers that resemble the flowers of the much larger bird of paradise plant. I have seen this in an orange/red variety and a yellow variety here in Southern California. It is drought tolerant. They don't get more than a few inches tall, and slowly spread horizontally. The leaves are gray/green and thin, maybe it is a succulent. The flowers are really neat looking but I'm having a tricky time trying to fine the name of this plant so I can find out more.
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