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''Cooperia'' was a genus of tender herbaceous perennials native to 
Ladybird Johnson Wildflower Center Native Plant Information Network entryUSDA PLANTS entry
{{Taxonbar, from=Q2996595 Amaryllidoideae Night-blooming plants Flora of Texas Amaryllidaceae genera Historically recognized angiosperm genera
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...
and the southern reaches of North America
North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
. Along with the former genus ''Habranthus'', ''Cooperia'' is now included in a more broadly circumscribed In geometry, a circumscribed circle for a set of points is a circle passing through each of them. Such a circle is said to ''circumscribe'' the points or a polygon formed from them; such a polygon is said to be ''inscribed'' in the circle.
* Circum ...
genus ''Zephyranthes
''Zephyranthes'' is a genus of temperate and tropical bulbous plants in the Amaryllidaceae, Amaryllis family, subfamily Amaryllidoideae, native to the Americas and widely cultivated as ornamentals. Following the expansion of the genus in ...
'', a member of the amaryllis family, Amaryllidaceae
The Amaryllidaceae are a family of herbaceous, mainly perennial and bulbous (rarely rhizomatous) flowering plants in the monocot order Asparagales. The family takes its name from the genus '' Amaryllis'' and is commonly known as the amaryl ...
. All three genera were commonly known as rain lilies because of their propensity for blooming after rain
Rain is a form of precipitation where water drop (liquid), droplets that have condensation, condensed from Water vapor#In Earth's atmosphere, atmospheric water vapor fall under gravity. Rain is a major component of the water cycle and is res ...
s. 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''.See also
*List of plants known as lily Lily usually refers to herbaceous plants of the genus ''Lilium'', with large showy trumpet-shaped flowers. Many species are cultivated as ornamentals.
Many other plants not closely related to lilies are called lilies, usually because their flowers ...
References
Bibliography
* Fellers, John D. "A Passion for Rainlilies: Cooperia, Habranthus, and Zephyranthes." ''Herbertia'' v51, 1996, pp 78–112. * Howard, Thad M. ''Bulbs for Warm Climates''. Austin, TX: University of Texas Press, 2001, pp 53; 54-56. * Ogden, Scott. ''Garden Bulbs for the South''. Dallas, TX: Taylor Publishing Co., 1994, pp 5–27. * *External links
Ladybird Johnson Wildflower Center Native Plant Information Network entry
{{Taxonbar, from=Q2996595 Amaryllidoideae Night-blooming plants Flora of Texas Amaryllidaceae genera Historically recognized angiosperm genera