Dr. Robert Price

Plant Pest Diagnostics Branch, California Department of Food & Agriculture
3294 Meadowview Road, Sacramento, CA 95832-1448, U.S.A.
Office: 916-738-6700
Fax: 916-262-1190
Email: robert.price@cdfa.ca.gov

Robert Price

Senior Seed Botanist

Curriculum Vitae


  • Ph.D. (Botany) – 1987, University of California, Berkeley.
  • M.S. (Botany) – 1979, University of Wisconsin, Madison.
  • B.A. (Biology) – 1976, Cornell University, Ithaca, New York.

Fields Of Specialization And Interest

  • Systematics of the Brassicaceae.
  • Systematics of the conifers.
  • Molecular systematics.
  • Seed identification and diversity.

Work Experience

  • 2013-present: Senior Seed Botanist, Plant Diagnostics Branch, California Department of Food and Agriculture.
  • 2009-2013: Associate Seed Botanist, Plant Diagnostics Branch, California Department of Food and Agriculture.
  • 2001-2009: Technical Editor and Biological Consultant; advisor to the Conifers Around the World project.
  • 1993-2000: Assistant Professor of Botany, University of Georgia.
  • 1990-1993: Postdoctoral Fellow, Department of Biology, Indiana University.
  • 1987-1990: Postdoctoral Research Associate, Generic Flora of the Southeastern United States project, New York State Museum & Harvard University.

Courtesy Appointments

  • 2014-present: Research Associate.  Center for Plant Diversity, Department of Plant Sciences, University of California, Davis

Selected Publications

  1. Price, R.A. 2011.Conifer Families. Pages 88-90, in Debreczy, Z. & I. Rácz, Conifers Around The World. DendroPress Ltd., Budapest, 1089 pp.
  2. Price, R.A. 2011. Scientific editor, Debreczy, Z. & I. Rácz, Conifers Around The World. DendroPress Ltd., Budapest, 1089 pp.
  3. Adams, R.P., J. A. Bartel, and R.A. Price. 2009. A new genus, Hesperocyparis, for the cypresses of the Western Hemisphere (Cupressaceae). Phytologia 91: 160-185.
  4. Debreczy, Z., K. Musial, R.A. Price, and I. Racz. 2009. Relationships and nomenclatural status of the Nootka Cypress (Callitropsis nootkatensis, Cupressaceae). Phytologia 91: 140-159.
  5. Huang, J., D.E. Giannasi, and R.A. Price. 2005. Phylogenetic relationships in Ephedra (Ephedraceae) inferred from chloroplast and nuclear DNA sequences. Molecular Phylogenetics and Evolution 35: 48-59.
  6. Huang, J., and R.A. Price. 2003. Estimation of the age of extant Ephedra using chloroplast rbcL sequence data. Molecular Biology and Evolution 20: 435-440.
  7. Quinn, C.J., and R.A. Price. 2003. Phylogeny of the Southern Hemisphere conifers. Acta Horticulturae 615: 129-136.
  8. Quinn, C.J., R.A. Price, and P.A. Gadek. 2002. Familial concepts and relationships in the conifers based on rbcL and matK sequence comparisons. Kew Bulletin 57: 513-531.
  9. Ward, N.M., and R.A. Price. 2002. Phylogenetic relationships of Marcgraviaceae: insights from three chloroplast genes. Systematic Botany 27: 149-160.
  10. Warwick, S.I., I.A. Al-Shehbaz, R.A. Price, and C. Sauder. 2002. Phylogeny of Sisymbrium (Brassicaceae) based on ITS sequences of nuclear ribosomal DNA. Canadian Journal of Botany 80: 1002-1017.
  11. Sweeney, P.W., and R.A. Price. 2001. Multivariate morphological analysis of the Cardamine concatenata alliance (Brassicaceae). Brittonia 53: 82-95.
  12. Price, R.A., I.A. Al-Shehbaz, and S.L. O’Kane. 2001. Beringia (Brassicaceae), a new genus of arabidopsoid affinities from Russia and North America. Novon 11: 332-336.
  13. Sweeney, P.W., and R.A. Price. 2000. Polyphyly of the genus Dentaria (Brassicaceae): evidence from trnL intron and ndhF sequence data. Systematic Botany 25: 468-478.
  14. Zhang, D., M.A. Dirr, and R.A. Price. 2000. Discrimination and genetic diversity of Cephalotaxus accessions using AFLP markers. Journal of the American Society of Horticultural Science 125: 404-412.
  15. Al-Shehbaz, I.A., and R.A. Price. 1998. Delimitation of the genus Nasturtium (Brassicaceae). Novon 8: 124-126.
  16. Galloway, G. L., R.L. Malmberg, and R.A. Price. 1998. Phylogenetic utility of the nuclear gene arginine decarboxylase: an example from the Brassicaceae. Molecular Biology and Evolution 15: 1312-1320.
  17. Price, R.A., A. Liston, and S.H. Strauss. 1998. Phylogeny and systematics of Pinus. Pp. 49-68 in D.M. Richardson, ed., Ecology and Biogeography of Pinus. Cambridge Univ. Press.
  18. Edwards-Burke, M.A., J.L. Hamrick, and R.A. Price. 1997. Frequency and direction of hybridization in sympatric populations of Pinus taeda and P. echinata (Pinaceae). American Journal of Botany 84: 879-886.
  19. Pax, D. L., R. A. Price, and H. J. Michaels. 1997. Phylogenetic position of the Hawaiian geraniums based on rbcL sequences. American Journal of Botany 84: 72-78.
  20. Jones, C.S., and R.A. Price. 1996. Diversity and evolution of seedling baupläne in Pelargonium (Geraniaceae). Aliso 14: 281-295.
  21. Rodman, J., R. A. Price, K. Karol, E. Conti, K. J. Sytsma, and J. D. Palmer. 1993. Nucleotide sequences of the rbcL gene indicate monophyly of mustard oil plants. Annals of the Missouri Botanical Garden 80: 686-699.
  22. Price, R.A., and J.D. Palmer. 1993. Phylogenetic relationships of the Geraniaceae and Geraniales from rbcL sequence comparisons. Annals of the Missouri Botanical Garden 80: 661-671.
  23. Price, R.A., and R.C. Rollins. 1991. New taxa of Draba (Cruciferae) from California, Nevada, and Colorado. Harvard Papers in Botany 3: 71-77.
  24. Hart, J.A., and R.A. Price. 1990. The genera of Cupressaceae (including Taxodiaceae) in the southeastern United States. Journal of the Arnold Arboretum 71: 275-322.
  25. Price, R.A. 1990. The genera of Taxaceae in the southeastern United States. Journal of the Arnold Arboretum 71: 69-91.
  26. Price, R.A. 1989. The genera of Pinaceae in the southeastern United States. Journal of the Arnold Arboretum 70: 247-305.
  27. Price, R.A.,and J.M. Lowenstein. 1989. An immunological comparison of the Sciadopityaceae, Taxodiaceae, and Cupressaceae. Systematic Botany 14: 141-149.
  28. Price, R.A., and R.C. Rollins. 1988. High elevation Draba (Cruciferae) of the White Mountains of California and Nevada. Aliso 12: 17-27.
  29. Price, R.A., J. Olsen-Stojkovich, and J.M. Lowenstein. 1987. Relationships among the genera of Pinaceae: an immunological approach. Systematic Botany 12: 91-97.
  30. Price, R. A. 1980. Draba streptobrachia (Brassicaceae), a new species from Colorado. Brittonia 32: 160-169.

Undergraduate Courses Taught

  • Introductory Botany
  • Plant Taxonomy
  • Dendrology


  • Principles of Plant Systematics
  • Computer Assisted Methods in Plant Systematics
  • Biology of the Conifers (Seminar Coordinator)
  • Origins and Diversity of Crop Plants (Seminar Coordinator)


  • Seed and Fruit Identification in Brassicaceae. CDFA, Sacramento, California
  • Identification of Genera of Brassicaceae. University of Colorado, Boulder
  • Species identification in Draba (Brassicaceae). University of Colorado, Boulder

Professional Society Memberships

  • American Association for the Advancement of Science (1982-present)
  • American Society of Plant Taxonomists (1979-present)
  • Botanical Society of America (1980-present)
  • International Society of Plant Taxonomists (1986-present)