FIGURE 1.

Plant and Slice of root of Rheum palmatum L. The leaves of Rheum palmatum L. are palmately lobed to half-lobed, with the lobes mostly narrowly triangular; its flowers are small, purple-red or yellowish-white; its buds are inverted pyramidal; and its fruits are small. The outer skin of rhubarb is yellowish-brown or reddish-brown, with white-like reticulate texture and scattered stars, and its broken surface is light reddish-brown or yellowish-brown, showing granularity; it has a fresh aroma and a bitter and slightly astringent taste. (A) Rheum palmatum L. is a kind of herb with medicinal value. (B) prepared slices of Rhubarb, containing a variety of active pharmacological ingredients.