Associate Professor, Plant Systematics

George Mason University



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Curriculum Vitae

PDF OF FULL CV: 2017-July
Ph.D., Systematic Botany, University of Texas at Austin, Austin, Texas, 2003.
B.S. with honors, Plant Biology, Cornell University, Ithaca, New York, 1997.

Professional Appointments
Associate Professor, Plant Systematics
           George Mason University, 2011 – present.
Director, Ted R. Bradley Herbarium (GMUF)
           George Mason University, 2005 – present.
Assistant Professor, Plant Systematics
           George Mason University, 2005 – 2011.
Post-doctoral Research Associate, National Research Council                                                                  US Army Edgewood Chemical Biological Center, 2004 – 2005.
Lecturer in Biological Sciences
           UT-Austin, School of Biological Sciences, 2003 – 2004.
Post-doctoral Fellow in Systematic Botany
           UT-Austin, Section of Integrative Biology, 2003 – 2004.

RESEARCH PUBLICATIONS - peer-reviewed (*=student authored)
In Press
37. *Oldham, K.A. and A. Weeks. In press. Varieties of Melampyrum lineare (Orobanchaceae) revisited. Rhodora 119 (979):xx-xx.
In Print
36. Weeks, A. 2016. Digitizing Virginia’s herbaria: a call to citizen-scientists. Banisteria 47: 3 – 8.
35. *Gostel, M.R., Weeks, A., Raharimampionona, J. and P.B. Phillipson. 2016. A partial taxonomic revision of the Rhynchocarpa clade of Commiphora (Burseraceae) endemic to Madagascar. Systematic Botany 41(4): 1004 – 1019.
34. *Collins, E., Gostel, M. and A. Weeks. 2016. An expanded nuclear phylogenomic toolkit for Sapindales. Applications in Plant Science. 4(12): 1 – 8.
33. Muellner-Riehl, A.N., Weeks, A., Clayton, J.W., Buerki, S., Chung, Y., Cody, S., Nauheimer, L., and S.K. Pell. 2016. Molecular phylogenetics and molecular clock dating of Sapindales based on plastid rbcL, atpB and trnL-trnF DNA sequences. Taxon 65(5):1019 – 1038.
32. *Gostel, M., Phillipson, P. and A. Weeks. 2016. Phylogenetic reconstruction of the myrrh genus, Commiphora (Burseraceae), reveals multiple radiations in Madagascar and clarifies infrageneric relationships. Systematic Botany 41(1): 67 – 81.
31. Chaboo, C.S. Biesele, M., Hitchcock, R.K. and A. Weeks. 2016. Beetle and plant arrow poisons of the Ju|’hoan and Hai||om San peoples of Namibia (Insecta, Coleoptera, Chrysomelidae; Plantae, Anacardiaceae, Apocynaceae, Burseraceae). ZooKeys 558: 9 – 54. http:/
30. *Ferrer-Gallego, P.P., Laguna, E., Alexander, S.N. and A. Weeks. 2015. Epitypification of Kosteletzkya pentacarpos (Malvaceae). Novon 24(3): 240 – 245.
29. G. Nelson, P. Sweeney, R. Rabeler, L. Wallace, D. Allard, H. Brown, J.R. Carter, M. Denslow, E. Ellwood, C. Germain-Aubrey, E. Gilbert, E. Gillespie, L. Goertzen, B. Legler, B. Marchant, T. Marsico, C.A. McCormick, A. Morris, Z. Murrell, M. Nazaire, C. Neefus, D. Paul, B. Ruhfel, T. Sasek, P.S. Soltis, J. Shaw, K. Watson, A. Weeks, and A.R. Mast. 2015. Digitization workflows for flat sheets and packets of plants, algae, and fungi. Applications in Plant Science 3(9): 150065. 9 pp.
28. *Gostel, M., Coy, K. and A. Weeks. 2015. Microfluidic PCR-based target enrichment: A case study in two rapid radiations of Commiphora (Burseraceae) from Madagascar. Journal of Systematics and Evolution. 53: 411 – 431.
27. Weeks, A., Zapata, A., Pell, S.K., Daly, D.C., Mitchell, J. and P.V.A. Fine. 2014. To move or to evolve: contrasting patterns and climatic niche evolution in “Terebinthaceae” (Anacardiaceae and Burseraceae). Frontiers in Genetics 5: 1 – 20.
26. *Gostel, M. and Weeks, A. 2014. Developing novel EPIC markers from EST databases and evaluating their phylogenetic utility in Commiphora (Burseraceae). Applications in Plant Sciences 2(4): 1 – 6.
25. *Weeks, A., Bachman, B., Josway, S., Laemmerzahl, A.F., and B. North. 2014. Guiding student inquiry of eukaryotic organismal biology using the plasmodial slime mold, Physarum polycephalum. The American Biology Teacher 76(3): 196 – 200.
24. M.E. Olson, J.A. Rosell, C. León, S. Zamora, A. Weeks, L. O. Alvarado, N. I. Cacho, and J. Grant. 2013. Convergent vessel diameter-stem diameter scaling across five clades of New- and Old- World eudicots from desert to rainforest. International Journal of Plant Science 174(7): 1062 – 1078. 10.1086/671432
23. *Weeks, A., Bachman, B., Josway, North, B. and M.T.N. Tsuchiya. 2013. Making microscopy motivating, memorable and manageable for undergraduate students with digital imaging laboratories. The American Biology Teacher 74(8): 578 – 581.
22. *Gostel, M.R., Dal Forno, M. and A Weeks. 2013. A navigation guide to cyberinfrastructure tools for botanical and lichenological systematic research. Plant Science Bulletin 59(3): 111 – 130. - 59
21. Stutzman, J.K., E. B. Lickey, A. Weeks, and C. K. McMullen. 2012. A taxonomic study of the foliar characteristics of Galápagos endemic Varronia P. Br. (Cordiaceae) species with nomenclatural notes. Journal of the Botanical Research Institute of Texas 6(1): 75 – 99.
20. *Alexander, S. N., L. C. Hayek, and A. Weeks. 2012. A subspecific revision of North American saltmarsh mallow, Kosteletzkya pentacarpos (L.) Ledeb (Malvaceae). Castanea 77(1): 106 – 122.
19. De Nova, J. A., R. Medina, J. C. Montero, A. Weeks, J. Rosell, M. E. Olson, L. E. Eguiarte and S. Magallón. 2012. Insights into the historical construction of species-rich Mesoamerican Seasonally Dry Tropical Forests: the diversification of Bursera (Burseraceae, Sapindales). New Phytologist 193: 276 – 287.
18. Daly, D. C., M. M. Harley, M. C. Martínez-Habibe, and A. Weeks. 2011. Burseraceae. Pp. 76 – 104 in The families and genera of vascular plants vol. 10, ed. K. Kubitzki. New York: Springer-Verlag.
17. Kronenfeld, B. J. and A. Weeks. 2010. A sketch-based language for representing uncertainty in the locations of origin of herbarium specimens. In: Proceedings of Accuracy 2010: 9th International symposium on spatial accuracy assessment in natural resources and environmental sciences, 20 – 23 July, 2010, Leicester, United Kingdom. N.J.Tate and P.F. Fisher (eds.). Leicester; University of Leicester on behalf of the International Spatial Accuracy Research Association (ISARA), 2010. pp. 237 – 240.
16. Rosell, J. A., M. E. Olson, A. Weeks, A. De-Nova, R. Medina, J. Pérez Camacho, T. P. Feria, R. Gómez-Bermejo, J. C. Montero and L. E. Eguiarte. 2010. Diversification in species complexes: tests of species origin and delimitation in the Bursera simaruba clade of tropical trees (Burseraceae). Molecular Phylogenetics and Evolution 57: 798 – 811.
15. *Weeks, A., K. E. Baird. and C. K. McMullen. 2010. Origin and evolution of endemic Galápagos Varronia species (Cordiaceae). Molecular Phylogenetics and Evolution 57: 948 – 954.
14. *Baird, K. E, V. Funk, J. Wen, and A. Weeks. 2010. Molecular phylogenetic analysis of Leibnitzia Cass. (Asteraceae: Mutisieae; Gerbera-complex), an Asian-North American disjunct taxon. Journal of Systematics and Evolution 48(3): 161 – 174.
13. Weeks, A., J. A. Leshin, K. L. Dretchen, E. W. Skowronski, and K. P. O’Connell. 2010. Population-level variation of preproricin gene contradicts expectation of neutral equilibrium in generalist plant defense locus. Toxicon 55(8): 1475 – 1483.
12. Leshin, J. A., M. Danielson, J. Credle, A. Weeks, K. P. O’Connell, and K. Dretchen. 2010. Characterization of ricin toxin family members from Ricinus communis. Toxicon 55: 658 – 661.
11. Weeks, A. and A. Tye. 2009. Phylogeography of palo santo trees (Bursera graveolens and Bursera malacophylla; Burseraceae) in the Galápagos archipelago. Botanical Journal of the Linnean Society 161: 396 – 410.
10. Weeks, A. 2009. Evolution of the pili nut genus (Canarium, Burseraceae) and its crop species. Genetic Resources & Crop Evolution 56: 765 – 781.
9. Weeks, A., and B. B. Simpson. 2007. Molecular phylogenetic analysis of Commiphora (Burseraceae) yields insight on the evolution and historical biogeography of an “impossible” genus. Molecular Phylogenetics and Evolution 42: 62 – 79.
8. Simpson, B. B., L. L. Larkin, A. Weeks, and J. D. McDill. 2006. Phylogeny and biogeography of Pomaria (Caesalpinioideae: Leguminosae). Systematic Botany 31: 792 – 804.
7. O’Connell, K. P., J. A. Leshin, A. Weeks, and E. W. Skowronski. 2006. Discovery and characterization of novel signatures from the Ricinus communis (castor bean) genome. Proceedings of the 25th Army Science Conference, Orlando, FL.
6. Weeks, A., D. C. Daly, and B. B. Simpson. 2005. Phylogenetic relationships and historical biogeography of the Burseraceae based on nuclear and chloroplast sequence data. Molecular Phylogenetics and Evolution 35: 85 – 101.
5. Simpson, B. B., J. A. Tate, and A. Weeks. 2005. The evolution and biogeography of Hoffmannseggia (Leguminosae, Caesalpinioideae, Caesalpinieae): A tale of many travels. Journal of Biogeography 32: 15 – 27.
4. Simpson, B. B., J. A. Tate, and A. Weeks. 2004. On the value of the genus Hoffmannseggia (Caesalpinieae: Caesalpinioideae: Leguminosae): Phylogeny and character evolution. Systematic Botany 29: 933 – 949.
3. Weeks, A. and B. B. Simpson. 2004. Molecular genetic evidence for interspecific hybridization among Hispaniolan Bursera (Burseraceae). American Journal of Botany 91: 975 – 983.
2. Simpson, B. B., A. Weeks, D. M. Helfgott, and L. L. Larkin. 2004. Species relationships in Krameria (Krameriaceae) based on ITS sequences and morphology: Implications for character utility and biogeography. Systematic Botany 29: 97 – 108.
1. Simpson, B. B., L. L. Larkin, and A. Weeks. 2003. Progress towards resolving the relationships of the Caesalpinia group (Caesalpinieae: Caesalpinioideae: Fabaceae). In: B. Klitgaard and A. Bruneau (editors) Advances in Legume Systematics X. Higher level Systematics and Biogeography. Royal Botanic Gardens, Kew, Richmond. pp. 123 – 148.



Read a recent paper:
Gostel, M., Phillipson, P. and A. Weeks. 2016. Phylogenetic reconstruction of the myrrh genus, Commiphora (Burseraceae), reveals multiple radiations in Madagascar and clarifies infrageneric relationships. Systematic Botany 41(1): 67 – 81.

View plants from my most recent trip:
Melampyrum in W Canada - 2015

Opportunites for GMU student researchers are available:
contact me for details.