About the Authors
- W. John Kress
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*To whom correspondence should be addressed. E-mail: kressj@si.edu
Affiliation Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington, D. C., United States of America
- David L. Erickson
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Affiliation Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington, D. C., United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: WK DE. Performed the experiments: DE. Analyzed the data: WK DE. Contributed reagents/materials/analysis tools: WK DE. Wrote the paper: WK DE.