1. Macroevolution and Macroecology Group, Research School of Biology Australian National University Canberra 0200 Australia
2. National Herbarium of New South Wales Royal Botanic Gardens and Domain Trust Sydney NSW 2000 Australia
3. Department of Biological Science Florida State University Tallahassee Florida 32306
4. Department of Scientific Computing, Florida State University Dirac Science Library Tallahassee Florida 32306