Zephyranthes chlorosolen

Zephyranthes chlorosolen, known by a number of common names including Drummond's rainlily, evening rainlily, evening star rainlily (names it shares with Zephyranthes drummondii), Brazos rainlily, Texas rainlily, and cebolleta, is a species of flowering plant in the family Amaryllidaceae. It is found from Kansas to Mexico, and has been introduced to southern Brazil. A geophytic perennial typically 18 to 35 cm tall, its lone flower opens in the evening and lasts only a few days.

Description
It is a geophytic perennial herb that typically grows between 18 and 35 cm tall. The leaf blades are dull green, and are up to 5 mm wide. The spathe is 3 to 5.7 cm. The flowers are erect; the salverform perianth is 7.3 to 16 cm long, and is white, sometimes tinged or veined with pink. The perianth tube is 7 to 13 cm, and is primarily white, sometimes with pale green proximally. The tepals are rarely reflexed. The stamens are fasciculate, and appear equal. The filaments are 0.2 to 0.5 mm, and are subulate. The anthers are 4 to 9 mm. The style is longer than the perianth tube. The stigma is capitate, and is among or very near the anthers. The pedicel is usually absent, but is rarely 0.1 cm.

Distribution
It is found in the United States (Texas, Oklahoma, Mississippi, Louisiana, Kansas, Arkansas, Alabama, New Mexico), Mexico, and southern Brazil from elevations of 0 to 2400 meters from sea level.