Dicotyledonous plants (dicots) make seeds that contain two cotyledons- organs that act as food stores for the developing embryo plant and form the first leaves when the seed germinates.
Dicotyledonous plants have a series of transport vessels running through the stem, roots, and leaves. This is known as the vascular system. In herbaceous dicots this is made up of two main types of transport vessels, the xylem and the phloem.
These transport tissues are arranged together in vascular bundles in the leaves, stems, and roots of herbaceous dicots.