The leaves of Polygonatum are whorled, 4 to 6 in each round, in the shape of a strip lanceolate, 8 to 15 cm long and about 6 to 16 mm wide. The front end of the leaves is curved into a hook.
The leaves of Rehmannia officinalis generally form a rosette shape at the base of the stem. The leaves are oval to long oval, green on the top, purplish or purplish red on the bottom, 2 to 13 cm long and 1 to 6 cm wide, with irregular round teeth or blunt serrations on the edge.
The flower petals are milky white or light yellow, 9 to 12 mm in length, and the bracts are membranous, in the shape of drill or strip lanceolate.
Ripe Rehmannia in the top of the stem slightly arranged into a raceme, or all single in the leaf axils scattered in the stem, corolla tube bow, outside purplish red, corolla has 5 lobes, apex slightly blunt or slightly concave, inside yellow, outside purplish red
