Christopher S Campbell, University of Maine, Orono, Maine, USA
Published online: March 2002
DOI: 10.1038/npg.els.0003722
The order Rosales contains about 8000 species, including many of economic and ecological importance. The nine families of this order are divided into three major subgroups: the rose family (Rosaceae), the urticoids (figs, nettles and relatives), and the rhamnoids (buckthorns and relatives).
Keywords: phylogeny; apple; pear; DNA sequence; evolution
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Figure 1. A tree showing relationships of the three major subgroups of the Rosales and characteristics (other than DNA sequence data) supporting the relationship between the groups.
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| Further Reading | |
| Angiosperm Phylogeny Group (1998) An ordinal classification for the families of flowering plants. Annals of the Missouri Botanical Garden 85: 531–553. | |
| Jansen S, Piesschaert F and Smets E (2000) Wood anatomy of Elaeagnaceae, with comments on vestured pits, helical thickenings, and systematic relationships. American Journal of Botany 87: 20–28. | |
| book Judd WS, Campbell CS, Kellogg EA and Stevens PF (1999) Plant Systematics. A Phylogenetic Approach. Sunderland, MA: Sinauer Associates. [See section on Rosales, pages 290–306, for descriptions, discussions, and illustrations of the families of the Rosales.]. | |
| proceedings Soltis DE, Soltis PS, Morgan DR et al. (1995) Chloroplast gene sequence data suggest a single origin of the predisposition for symbiotic nitrogen fixation in angiosperms. Proceedings of the National Academy of the United States of America 92: 2647–2651. | |
| Soltis PE, Soltis DE and Chase MW (1999) Angiosperm phylogeny inferred from multiple genes as a tool for comparative biology. Nature 402: 402–404. | |
| Thulin M, Bremer B, Richardson J et al. (1998) Family relationships of the enigmatic rosid genera Barbeya and Dirachma from the Horn of Africa region. Plant Systematics and Evolution 213: 103–119. | |
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