Zephyranthes robusta


Zephyranthes robusta, commonly known as the Brazilian copperlily, pink fairy lily or the pink rain lily, is a species of herbaceous flowering bulb in the family Amaryllidaceae. It is native to Brazil, Argentina and Uruguay, but is now naturalized in Florida, Colombia, South Africa, and Mauritius.

Description

Zephyranthes robusta is a relatively large species of rain lily. It grows from ovate to obovate bulbs around in diameter.
Plants bear solitary lavender to pale pink, funnel-shaped flowers, long, held at a slight angle on scapes, with a leaf-like bract long at the base. Flowers typically appear after rain from late summer to early fall and are followed by large deep green leaves, measuring wide and long.

Taxonomy and nomenclature

Zephyranthes robusta belongs to the genus Zephyranthes of the tribe Hippeastreae, within the subfamily Amaryllidoideae of the amaryllis family. In older classifications, it was sometimes included within the lily family. Once treated as Habranthus robustus, it is now re-included in Zephyranthes.
It is commonly known as the 'pink fairy lily', 'pink rain lily', 'pink zephyr lily', 'pink magic lily', 'pink fawn lily', and 'Colombian mini-amaryllis'. It is known as cebollita in Spanish.
Due to having the same common names, it is also frequently confused with other 'pink rain lilies' - namely Zephyranthes rosea and Zephyranthes carinata. The three species are often mislabeled, but Z. robusta is easily recognizable from the other two by its larger, more strongly bent, paler pink flowers. Z. robusta also has leaves covered with a fine grayish waxy coating in contrast to the leaves of Z. carinata.

Distribution and habitat

Zephyranthes robusta is believed to have originated from Rio Grande do Sul of Brazil. It is native to Brazil, Argentina, and Uruguay, and is widely naturalized elsewhere.

Cultivation and uses

Zephyranthes robusta is widely grown as an ornamental. It is one of the most prolific of the summer flowering rain lilies. They are propagated by dividing the bulbs and from seed. They are not as tolerant of colder temperatures as other rain lilies.

Chemical composition

The plant contains some toxic compounds like lycorine. Other compound include galanthamine, 3-epimacronine, hippeastidine, lycoramine, galanthine, haemanthamine, haemanthidine, hamayne, tazettine, vittatine, 11-hydroxy vittatine, 8-O-demethylmaritidine.

Toxicity

Similar to the closely related species of Zephyranthes, Z. robusta contains toxic alkaloids. Mainly galantamine-type alkaloids which can be lethal for humans.