Paleodicots (sometimes spelled "palaeodicots") is an informal name used by botanists (Spichiger & Savolainen 1997, Leitch et al. 1998) to refer to angiosperms which are not
monocots or
eudicots. The paleodicots correspond to
Magnoliidae sensu Cronquist 1981 (minus Ranunculales and Papaverales) and to
Magnoliidae sensu Takhtajan 1980 (Spichiger & Savolainen 1997). Some of the paleodicots share apparently plesiomorphic characters with monocots, e.g., scattered vascular bundles, trimerous flowers, and non-tricolpate
pollen. The "paleodicots" are not a monophyletic group and the term has not been widely adopted. The
APG II system does not recognize a group called "paleodicots" but assigns these early-diverging dicots to several orders and unplaced families: Amborellaceae,
Nymphaeaceae (including
Cabombaceae),
Austrobaileyales,
Ceratophyllales (not included among the "paleodicots" by Leitch et al. 1998),
Chloranthaceae, and the
magnoliid clade (orders
Canellales,
Piperales,
Laurales, and
Magnoliales). Subsequent research has added
Hydatellaceae to the paleodicots. The term
paleoherb is another older term for flowering plants which are neither eudicots nor monocots. ==References==