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| | Sytsma, Kenneth J., Jeffrey Morawetz*, J. Chris Pires, and Clifford W. Morden. |
 | | The traditional Urticales (Ulmaceae, Celtidaceae, Cannabaceae, Moraceae, Urticaceae, and Cecropiaceae) is one of the more controversial orders in terms of family circumscriptions and both inter- and intra-familial phylogenetic relationships. |
 | | Although the Ulmaceae has now been demonstrated to be sister to the rest of the urticalean lineage with both morphological and molecular data, the circumscription and relationships of the other families has remained unclear and controversial. |
 | | The majority of morphological analyses have concluded either that (1) Celtidaceae, Cecropiaceae, Moraceae, and Urticaceae should be combined as one family, or (2) at least Moraceae and Urticaceae should be merged; the placement of Cannabaceae being largely unknown. |
| www.ou.edu /cas/botany-micro/botany2000/section13/abstracts/232.shtml (329 words) |
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