any of a genus (Zephyranthes) of bulbous plants of the lily family, with hollow stems, grassy leaves, and funnel-shaped flowers of yellow, pink, red, or purple-tinged white
See atamasco lily in American Heritage Dictionary 4
(ătˌə-măsˈkō)
noun
A bulbous plant (Zephyranthes atamasco) of the southeast United States, having a showy, solitary, white to pinkish flower on a long stalk.