During my travels in Mexico I have encountered natural hybrids of Sprekelia with Zephyranthes. Sprekelia formosissima and various Zephyranthes species bloom at the exact same time with the first rains of the rainy season in May. Thus, there is no temporal impediment that would prevent them from crossing...and we all know how promiscuous Apis and Bombus species can be! The hybrid flowers resemble Zephyranthes more than Sprekelia, however some genetic influence from Sprekelia is apparent in the wider flower segments and bilateral symmetry. The flowers are not radially symmetric like all other Zephyranthes species. The color is pink and not the bright red that would be expected from Sprekelia. The hybrid plants resemble Zephyranthes on steroids. The leaves are much bigger and wider, and the flower scape is longer than usual and also much thicker. Unfortunately, I don't have a picture. I will try to take one this spring when the plants bloom again and upload it to the wiki.