I am a plant that is often associated with a specific holiday, though I am not a conifer. My berries are a popular symbol, and I have parasitic tendencies. What am I?

1. I am a semi-parasitic plant that grows on the branches of trees.
2. My leaves are oval-shaped and usually stay green throughout the year.
3. I produce white, sticky berries that are used in traditional decorations.
4. I'm a symbol of peace and love and used in kissing traditions during certain holidays.