The term "dicotamus" appears to be a misspelling or confusion with "dicot" or "dicotyledon," which refers to a group of flowering plants (angiosperms) that typically have two seed leaves or cotyledons. Dicotyledons exhibit a wide variety of forms and include many familiar plants, such as beans, roses, and oak trees. They are characterized by features such as net-like leaf venation and flower parts usually in multiples of four or five. If you meant something else by "dicotamus," please provide additional context.