Lilium grandiflorum is a variety of lemon lily belonging to Liliaceae. It is a rhizomatous perennial herb with spherical bulbs, scattered leaves, narrow lanceolate leaves, racemes, and few single flowers; Bracts leaf shaped, lanceolate, long peduncles, drooping flowers, rolled petals, red with purple spots, papillate protrusions on both sides of nectaries, filaments, hairless, anthers orange red; Ovary cylindrical, flowering period from July to August. Distributed in Japan, North Korea, Russia (Far East region), and China; Distributed in Northeast, North China, Shaanxi and other places in China. Growing in sandy valleys below an altitude of 1290 meters.

Juandan lily is a perennial bulbous plant of the lily genus in the lily family. The bulb is wide ovate and flattened, and the scale leaves are wide ovate; The stem often has purple stripes and white hairs; The leaves are oblong lanceolate or lanceolate in shape, with nearly hairless on both sides. The leaf edges have papillary protrusions, and the upper leaf axils have bulbous buds; The bracts are leaf shaped, ovate lanceolate, with rolled petals that are orange red in color and have purple black spots. The ovary is cylindrical in shape; The capsule is narrow and oval shaped; The flowering period is from July to August. Due to its fiery red color and curled petals, it is called "Juandan".