Polygonatum King Solomon's-seal or Solomon's Seal, is a genus of about 50 species of flowering plants. Polygonatum sibiricum, Rhizome usually shortly branched, subterete or tuberous terete, 1--2 cm thick. Stem erect or sometimes subscandent, 50--90(--140) cm, glabrous. Leaves in whorls of 4--6, sessile, abaxially glaucous, linear-lanceolate, 8--15 cm × 4--16 mm, glabrous, apex strongly cirrose or curved. Inflorescences umbel-like, usually 2--4-flowered; peduncle 1--2 cm; bracts borne at base of pedicel, subulate to linear-lanceolate, 3--5 mm, membranous, 1-veined, persistent. Flowers pendulous; pedicel (2.5--)4--10 mm. Perianth milky white to pale yellow, cylindric, slightly constricted in middle, 0.9--1.2 cm; lobes ca. 4 mm. Filaments 0.5--1 mm; anthers 2--3 mm. Ovary ca. 3 mm.
Investigation of the rhizomes of Polygonatum sibiricum led to the isolation of the previously reported neoprazerigenin A 3-O-beta- lycotetraoside [3], its methyl proto-type congener 2, and two new steroidal saponins, sibiricosides A [1] and B [4].