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. Cultivation Īll plant species belonging to the genus Lycoris, including L. They suggest that the "species" of Lycoris presently recognized may not be distinct. found that all the other species of Lycoris they examined were nested within Lycoris radiata. In phylogenetic analyses based on chloroplast genes, Hori et al. It has been suggested that they were introduced into Japan from China along with rice cultivation. The Japanese triploids are genetically uniform. The triploid forms are sterile, and reproduce only vegetatively, via bulbs. These are widespread in China and also in Japan, from where the species was introduced into cultivation in America and elsewhere. Triploid forms, with 33 chromosomes, are known as L. It is a diploid, with 11 pairs of chromosomes (2N = 22), and is able to reproduce by seed. The presumed original form of Lycoris radiata, known as L. The plant retains its leaves throughout the winter season, but will begin to shed them away as temperatures start to warm in late spring. ![]() ![]() The leaves, which tend to emerge in October, are a greyish-green color, parallel-sided, 0.5–1 cm ( 1⁄ 4– 3⁄ 8 in) wide and feature a paler central stripe. Individual flowers are irregular, with narrow segments which curve backwards. Four to six 2-inch long flowers, arranged in umbels, perch atop each plant stalk. The flowers of the plant generally appear around late August to early September, before the leaves fully develop, on scapes rising 30–70 centimetres (12–28 in) from the ground. When in full bloom, spindly stamens, likened to the image of spider legs, extend slightly upward and outward from the flower's center. Lycoris radiata is a bulbous perennial with showy, bright-red flowers. A girl with a bouquet of red spider lily flowers
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