Cornus officinalis is a species of dogwood known also as Japanese cornel or Japanese cornelian cherry or Cornelian cherries, not to be confused with C. mas, which is also known as the "Cornelian cherry." The correct term would be Korean cornel dogwood or Chinese cornel dogwood since the flower originated from Korea and China.
山茱萸性微温，味酸、涩，归肝、肾经。有补益肝肾，固涩Cornelian cherry juices are rich in potassium, calcium, sodium, iron, zinc, manganese, and copper. Compared to other juices obtained from plum, pear, and apple, Cornelian cherry juice contained higher levels of dietary minerals(source:wikipedia)
精气的功效。用于眩晕耳鸣、腰膝酸痛、阳痿遗精、遗尿尿 频、崩漏带下、大汗虚脱、内热消渴等症。命门火炽、素有 湿热及小便不利者不宜使用。
黄丸、八仙长寿丸、桂附地黄丸、益明地黄丸、济阴地黄丸 等方剂中。此外，民间也用鲜萸肉以糖、蜜、酒浸汁作健身 饮料。(source:wikipedia)