Snowberry
Also called: Waxberry or Ghostberry
Scientific name: Symphoricarpos
The flowers and the berries will be white.
Snowberry (S. albus) is an important winter food source for
quail, pheasant, and grouse, but is considered poisonous to humans. The berries contain the isoquinoline alkaloid chelidonine, as well as other alkaloids. Ingesting the berries causes mild symptoms of vomiting,
dizziness, and slight sedation in children. (from Wikipedia)