Introduction to Rhubarb palmatum: Rhubarb palmatum is a tall and sturdy herbaceous plant of the Polygonaceae family, up to 2 meters high, with thick woody rhizomes. The stem is upright and hollow, the length and width of the leaves are nearly equal, the base is nearly heart-shaped, the upper surface of the leaves is rough to have papillae-like hairs, the petioles are thick, cylindrical, nearly as long as the leaves, the stipules are large, smooth inside and rough outside. Panicle, flowers are small, usually purple-red, sometimes yellow-white; the pedicel joint is located below the middle; the outer whorl of the tepals is narrow, the inner whorl is larger, wide elliptical to nearly round, the stamens are not exposed, and are adhered to the base of the filaments; The room is rhombus-shaped and wide-ovate, the fruit is oblong-oval to oblong-shaped, and the seeds are wide-ovate, brown and black. Flowers bloom in June and bear fruit in August.