** Samples of Phylogenetic Trees

The large biological tree collections used in this study were obtained
from two recent Bayesian analyses.

- 20,000 trees obtained from a Bayesian analysis of an alignment
of 150 taxa (23 desert taxa and 127 others from freshwater,
marine, ands oil habitats) with 1,651 aligned sites [1]. The
majority and strict consensus resolution rates for these 20,000
trees are 87% and 34%, respectively.
- 33,306 trees obtained froman analysis of a three-gene, 567 taxa
(560 angiosperms, seven outgroups) dataset with 4,621 aligned
characters, which is one of the largest Bayesian analyses done
to date [2]. The majority and strict consensus resolution rates
for these 33,306 trees are 93% and 51%, respectively.

The sample trees are randomly selected from the above data tree sets.
- 150-taxa-10-trees.tre: 150 taxa, 10 trees.
- 150-taxa-100-trees.tre: 150 taxa, 100 trees.
- 150-taxa-1000-trees.tre: 150 taxa, 1000 trees.
- 567-taxa-10-trees.tre: 567 taxa, 10 trees.
- 567-taxa-100-trees.tre: 567 taxa, 100 trees.
- 567-taxa-1000-trees.tre: 567 taxa, 1000 trees.


* Acknowledgement
We would like to thank Matthew Gitzendanner, Bill Murphy, Paul Lewis, and
David Soltis for providing us with the Bayesian tree collections.


* References
[1]L. A. Lewis and P. O. Lewis. Unearthing the molecular phylodiversity of desert
soil green algae (chlorophyta). Syst. Bio., 54(6):936?947, 2005.
[2]D. E. Soltis, M. A. Gitzendanner, and P. S. Soltis. A 567-taxon data set for
angiosperms: The challenges posed by bayesian analyses of large data sets. Int. J.
Plant Sci., 168(2):137?157, 2007.
