Traditionally divided into 6 subclasses. Annuals, biennials, vines, epiphytes, aquatics, parasites, and saprotrophs are also well represented in dicots. Vascular bundles of the stem are usually borne in a ring that encloses the pith. Vessel elements present except in some putatively primitive woody or aquatic families. Most dicots have a primary root system derived from the radicle, although some have an adventitious root system commonly seen in the class of monocots.
Leaves are mostly net-veined.