This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.
You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species.close box
Brunsfeld, S. J., P. S. Soltis, D. E. Soltis, P. A. Gadek, C. J. Quinn, D. D. Strenge, and T. A. Ranker. 1994. Phylogenetic relationships among the genera of Taxodiaceae and Cupressaceae: evidence from rbcL sequences. Systematic Botany 19: 253-262.
Chaw, S.-M., H.-M. Sung, H. Long, A. Zharkikh, and W.-H. Li. 1995. The phylogenetic position of the conifer genera Amentotaxus, Phyllocladus, and Nageia inferred from 18S rRNA sequences. Journal of Molecular Evolution 41: 224-230.
Hart, J. 1987. A cladistic analysis of conifers: preliminary results. Journal of the Arnold Arboretum 68: 269-307.
Nixon, K. C., W. L. Crepet, D. Stevenson, and E. M. Friis. 1994. A reevaluation of seed plant phylogeny. Annals of the Missouri Botanical Garden 81: 484-533.
Page, C. N. 1990. Pinatae. Pp. 290-361 in The families and genera of vascular plants, ed. K. Kubitzki, vol. 1, Pteridophytes and gymnosperms, eds. K. U. Kramer and P. S. Green. Berlin: Springer-Verlag.
Price, R. A. 1995. Familial and generic classification of the conifers. American Journal of Botany 82(6 Supplement): 110.