What is the difference between monocotyledonous and dicotyledonous plants?

There are differences in the structure of both the plants themselves and their seeds between monocotyledons and dicots. In most species of monocotyledonous plants, the embryo has one cotyledon (in dicotyledons, respectively, there are two cotyledons). Monocots do not form a layer of cambium and therefore have much thinner stems than dicots. Their stem is mainly straight and directed upward, has no branches, and the leaves are attached directly to the stem. In dicotyledons, the root system consists of the main and lateral roots, and in monocots – of adventitious ones.