All plant species belonging to the genus
Lycoris, including
L. radiata, are native to East Asia. The plant was first introduced into the United States in 1854 following the signing of the
Treaty of Kanagawa, a peace treaty brokered between the United States of America and Japan which effectively opened up Japanese ports for trade with the U.S. It is alleged that Captain William Roberts, a
botany enthusiast and an ally of
Commodore Matthew Calbraith Perry of the U.S Navy, returned to the U.S with only three
bulbs of the red spider lily from this travels abroad. The bulbs were then planted by his niece who found that they did not bloom until after the first good rain in the fall season.
L. radiata has since become naturalized in
North Carolina,
Texas, Oklahoma, and many other
southern states of the US. Since the Japanese variety of
L. radiata is a sterile triploid, the introduced plants were also sterile and could only reproduce via bulb division. Today, red spider lilies are appreciated as ornamental and medicinal plants in various countries all across Asia, Europe and in the United States.
Lycoris radiata is not frost-hardy in countries like England, and so can only be grown under glass or in a very sheltered environment. In warm-summer climates such as the U.S. east of the Rocky Mountains, where there is sufficient summer heat to harden off the bulbs, the plants are hardy to around . Like other plants in the genus
Lycoris,
L. radiata remains dormant during the summer season, flowering on leafless scapes once the summer begins to transition into the fall. Furthermore, in the environments in which they are commonly grown,
L. radiata tend to bloom in step with the coming of the rainy season, and or the coming of the hurricane season, as well as the fall equinox. As such, spider lilies are also known as hurricane lilies or equinox lilies. == Toxicity and medicinal applications ==