Cooperia (plant)
Cooperia was a genus of tender herbaceous perennials native to South America and the southern reaches of North America. Along with the former genus "Habranthus", "Cooperia" is now included in a more broadly circumscribed genus "Zephyranthes", a member of the amaryllis family, Amaryllidaceae. All three genera were commonly known as rain lilies because of their propensity for blooming after rains. Species formerly placed in "Cooperia" bloom in summer and fall. Although "Cooperia" was considered distinguishable from the better known rain lily genus, "Zephyranthes", by its fragrance similar to primroses, its white or yellow pollen, its tolerance for drout  and desert conditions (Howard 2001:54) and tendency to be night-blooming (Ogden 1994:11), it is now considered to be part of "Zephyranthes" and the genus name "Cooperia" is no longer accepted. Cultivation. Hybrids have been successfully created with species then placed in separate genera "Zephyranthes" (× "Cooperanthes") and "Habranthus" (× "Cooperanthus") (Ogden 1994:11, Howard 2001:54). All are now within "Zephyranthes".