Eleutherococcus senticosus (formerly Acanthopanax senticosus) is a species of small, wooy shrub in the family Araliaceae native to Northeastern Asia. In Chinese medicine it is known as cì wǔ jiā (刺五加). It is commonly called eleuthero, and was previously marketed in the United States as Siberian Ginseng as it has similar herbal properties to those of Panax ginseng. However, it belongs to a different genus in the family Araliaceae, and it is currently illegal in the United States to market eleuthero as Siberian Ginseng since "ginseng" only refers to Panax species.