The Magnoliophyta is the largest plant group on Earth, containing more than 250,000 described species. The Magnoliophyta is subdivided into two classes, Liliopsida (monocots) and Magnoliopsida (dicots).
Plants in this division are also termed the Angiosperms, or flowering plants. They have leaves, stems, roots, and vascular tissue (xylem and
phloem). The ovules develop into seeds and are enclosed within an ovary, thus the term angiosperm, meaning "enclosed seed". The flowering
plants include all cereal grains, grasses, broad-leaved shrubs and trees and most ornamentals.
Various paths for exploration or comparison of four major flowering plant classification systems (Cronquist, Takhtajan, Thorne and the Angiosperm Phylogeny Group system). From Texas A&M University. www.csdl.tamu.edu/FLORA/newgate/cronang.htm
Phylogenetic trees, technical descriptions of all orders and families, references, and links. By Peter Stevens of the Missouri Botanical Garden. www.mobot.org/MOBOT/Research/APweb