San Diego State University Herbarium (SDSU)

Herbarium Associated Projects

The SDSU plant collections primarily assist students and faculty of the University with research projects and teaching needs.
Many of the projects include phylogenetic analysis of plant taxa, ecological studies of habitats and plant communities, comparative floristic work in southern California, and plant taxonomic studies. The herbarium is also available for use by students from other universities, individuals from government agencies and environmental consulting firms, and the general public.

A major, ongoing project is the Checklist of the Vascular Plants of San Diego County. This work is in collaboration with Dr. Jon Rebman of the Botany Department at the San Diego Natural History Museum.

Other projects have included floristic surveys of Mission Trails Regional Park, the SDSU Santa Margarita Ecological Reserve,
Palomar Mountain State Park, Point Loma, and systematic studies of the genera Calyptridium, Cryptantha, Fritillaria, and Pogogyne.

Recent Publications with Cited Specimens from the SDSU Herbarium:

Benet-Pierce, N. and M. G. Simpson. 2014. The taxonomy of Chenopodium desiccatum and C. nitens, sp. nov.
   Journal of the Torrey Botanical Society 141:161-172.
Rebman, J. P. and M. G. Simpson. 2014. Checklist of the Vascular Plants of San Diego County, 5th edition. San Diego Natural
     History Museum Publications. (link)

Ripma, L.*, M. G. Simpson, and K. Hasenstab-Lehman*. 2014. Geneious! Simplified genome skimming methods for
   phylogenetic systematic studies: A case study in Oreocarya (Boraginaceae). Applications in Plant Sciences
   doi: 10.3732/apps.1400062.
Simpson, M. G., R. Dowdy*, J. P. Rebman, R. B. Kelley, and L. M. Simpson. 2014. The recognition of two species in
   Eremocarya (Boraginaceae): Evidence from fornix bodies, nutlets, corolla size, and biogeography. Madroño 61: 259–275.

Guilliams, C. M.*, B. A. Veno, M. G. Simpson, and R. B. Kelley. 2013. Pectocarya anisocarpa, a new species of Boraginaceae,
     and a revised key for the genus in western North America. Aliso 31: 1-13.
Silveira, M.* and Simpson, M. G. 2013. Phylogenetic systematics of the mesa mints: Pogogyne (Lamiaceae).
     Systematic Botany 38: 792-794.
Simpson, M. G., J. P. Rebman, K. E. Hasenstab-Lehman, C. M. Guilliams, and P. McConnell. 2013. Cryptantha wigginsii
(Boraginaceae): A presumed extinct species rediscovered. Madroño 60(1): 24-34.
Simpson, M. G. and J. P. Rebman. 2013. A new species of Cryptantha (Boraginaceae) from the Sierra de San Pedro Mártir,
     Baja California, Mexico. Madroño 60(1): 35-45.
Yost, J. M., M. Bontrager, S. McCabe, D. Burton*, M. G. Simpson, K. M. Kay, and M. Ritter. 2013. Phylogenetic relationships
     and evolution in Dudleya (Crassulaceae). Systematic Botany 38, in press.

Dodero, M. W.* and M. G. Simpson. 2012. Dudleya crassifolia (Crassulaceae), a new species from northern Baja California,
     Mexico. Madroño 59: 223-229.
Hasenstab-Lehman, Kristen E.* and M. G. Simpson. 2012. Cat’s Eyes and Popcorn Flowers: Phylogenetic Systematics of the
     Genus Cryptantha s.l. (Boraginaceae). Systematic Botany 37: 738–757.

Benet-Pierce, N. and M. G. Simpson. 2010. Chenopodium littoreum (Chenopodiaceae): a new goosefoot from dunes of
     south-central coastal California. Madroño 57: 64–72.
Simpson, M. G., M. Silveira*, and C. M. Guilliams.* 2010. Taxonomy of Calyptridium parryi (Montiaceae). Madroño 57: 154-160.

Pierce, Nuri and Michael G. Simpson. 2009. Polyaperturate pollen types and ratios of heteromorphism in the monocot genus
     Conostylis R. Br. (Haemodoraceae). Australian Systematic Botany 22: 1-15.