Dilleniales

(botany) An order of dicotyledonous plants in the subclass Dilleniidae characterized by separate carpels and numerous stamens.

An order of flowering plants, division Magnoliophyta (Angiospermae), subclass Dilleniidae, class Magnoliopsida (dicotyledons). It consists of two families: the Dilleniaceae, with about 350 species; and the Paeoniaceae, with a single genus of some 30 species. Within its subclass the order is marked by separate carpels; numerous stamens; bitegmic (having two integuments), crassinucellate (having a nucellus that is more than one cell thick) ovules; and seeds that have a well-developed endosperm and are provided with an aril (a partial or complete covering or appendage,

usually derived from the funiculus of the ovule). The garden peony (Paeonia lactiflora) is a familiar member of the order.See also Dilleniidae; Magnoliophyta.

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Dilleniales is the botanical name of an order of flowering plants. The Cronquist system, of 1981, recognized such order and placed it in subclass Dilleniidae. It used the following circumscription:

• order Dilleniales

  family Dilleniaceae

  family Paeoniaceae

The APG II system, of 2003, assigns the first of these families to the core eudicots, unplaced as to order, although APG II debates either including it in order Caryophyllales or reinstating the order Dilleniales.

The APG II system assigns the second of these families to the order Saxifragales.

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