A rhizome is a piece of a hop plant that will sprout roots when planted, and it's what you will need to purchase if you want to add hops to your garden. Rhizomes are available from most online and local home brew shops in the spring.
More recently they have become symbolic of sinister things. A snake ring worn on the first finger suggests this is an egotistical person and they are using the snake to enhance their status. A snake ring on the second finger suggests this is a materialistic person and they are using the snake to enhance their wealth.
They represent all that is evil, corrupt and dangerous. Others say that snakes are a sign of sexuality, potency or psychic energy. In your dream it sounds like your association to the snake was one of evil and mistrust. It also sounds like in the dream you were the only one who.