Article
Article
Rosales
Article By:
Chase, Mark W. Molecular Systematics Section, Jodrell Laboratory, Royal Botanical Gardens, Kew, Surrey, United Kingdom.
Last reviewed:August 2020
DOI:https://doi.org/10.1036/1097-8542.593700
An order of flowering plants in the eurosid I group of the rosid eudicots. In previous modern systems of classifications, this order was considered to be much larger and to contain up to 25 families, but recently on the basis of DNA sequence studies the number of families was greatly reduced and changed. The order as now recognized contains only 11 families, many of which are small. Many families in this order are wind-pollinated (for example, Moraceae, Ulmaceae, and Urticaceae, formerly placed in the Urticales) and exhibit the typical syndrome of small petalless flowers with dangling anthers, whereas the other families are insect-pollinated with large, showy flowers in which the carpels are sometimes free. See also: Flower; Magnoliophyta; Magnoliopsida; Pollination
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