The
Cronquist system is a
taxonomic classification system of
flowering plants. It was developed by
Arthur Cronquist in his texts
An Integrated System of Classification of Flowering Plants (1981) and
The Evolution and Classification of Flowering Plants (1968; 2nd edition, 1988). Cronquist's system places flowering plants into two broad classes,
Magnoliopsida (
dicotyledons) and
Liliopsida (
monocotyledons). Within these classes, related orders are grouped into subclasses. While the scheme was widely used, in either the original form or in adapted versions, many botanists now use the
Angiosperm Phylogeny Group classification for the orders and families of flowering plants, first developed in 1998. The system as laid out in Cronquist's
An Integrated System of Classification of Flowering Plants (1981) counts 64 orders and 321 families in class Magnoliopsida and 19 orders and 65 families in class Liliopsida.