This is the second flowering for one of the Red Yucca plants in my garden. A spring and fall flowering are common, but not all of my plants do this. It seems the ones with the southern exposure are more likely to produce flowers twice a year than those in other locations.
The birds have eaten all the seeds from last season's flowers, so the second flowering will provide more food for them in a few months. In the meantime, I'll have some nice color in my garden.
A few years ago, the University of Arizona began research on the Hesperaloe funifera, or Giant Red Yucca, to see if the long fibers it produced could be used to make strong paper products. The H. funifera is a very close relative of H. parviflora. If the research turned out to be positive, then perhaps it could become a crop plant much like cotton.