San Diego State University Herbarium (SDSU)

Welcome to the SDSU Herbarium!

We are a member of:
Consortium of California Herbaria (CCH2)
Society of Herbarium Curators (SHC)

Citing SDSU Herbarium specimens

See Also:
San Diego State University Field Stations

Mailing Address:

SDSU Herbarium
Dr. Lluvia Flores-Rentería,            Co-Curator
Department of Biology
5500 Campanile Drive
San Diego State University
San Diego, California 92182, USA
SDSU Herbarium
Dr. Michael G. Simpson,                 Co-Curator
Department of Biology
5500 Campanile Drive
San Diego State University
San Diego, California 92182, USA

Nuri Benet-Pierce, Research Associate
Brenda Bennett, Curatorial Assistant
Kyle Gunther, Image Processing

   The San Diego State University Herbarium (SDSU) is a depository of over 25,600 pressed and mounted plant specimens used in research and teaching. The purpose of these specimens is: 1) to serve as voucher documentation for research projects; 2) to serve as resources for plant identification; and 3) to serve as exemplars in plant courses. In addition, the herbarium both receives and provides loans of plant specimens used in active systematic research. The herbarium collection specializes in land plant specimens from San Diego County, California, and Baja California, with some collections from Argentina, Australia, Chile, and the south Pacific. To date, data from our collections have been used in over 360 citations. See Publications utilizing and citing specimens from the SDSU Herbarium.


SDSU Herbarium processes over 1200 specimens from prolific collector Dick Swinney. See here.

Eva Struble, Associate Professor at the School of Art and Design, San Diego State University used specimens from the SDSU Herbarium in her Honors 113 class: "Sage and Sweat, the Drawn and Researched Walk." See here.

Publication of: Yost, J. M., K. D. Pearson, et al. 2020. The California Phenology Collections Network: Using digital images to investigate phenological change in a biodiversity hotspot. Madroño 66:130-141.

As of 3 Sep 2021, we have entered collection data for 100% of our herbarium specimens.
We have imaged
>99% of our herbarium specimens!

The SDSU Herbarium was part of the SDSU Science Sampler, Sat. 23 March 2019

iDigBio 2018 Summit Report

Consortium of California Herbaria 2 (CCH2) Website
California Phenology

KPBS article and video clip about our NSF-funded digitization grant
  SDSU News Center Article on NSF-funded digitization grant we just received!

Publication of: Dudleya hendrixii, A new, rare species from Colonet Mesa, Baja California
   Named after guitarist Jimi Hendrix! 
McCabe, Dodero, and Simpson 2016, Madroño 63: 359-365.
Articles on naming of Dudleya hendrixii
   L. A. Times
San Diego State University

   San Diego Union Tribune


Field Botany of San Diego County course: Global Campus Registration

Some Plants of Chile / Algunas Plantas de Chile

Nice video on The Plant Family Tree (Kew Botanic Gardens)

Amsinckiinae Taxonomy and Images

Plant Systematics Resources 

SDSU is a member of:
Consortium of California Herbaria 1 (California records only; note: not recently updated!)
Consortium of California 2 (all records)
(Baja California and Baja California Sur, Mexico records only)
(all records)

Our records are entirely databased.
are currently being imaged as part of the California Phenology NSF-supported TCN grant.

   The Curator of the SDSU Herbarium is Dr. Lluvia Flores-Rentería and the Collections Manager is Dr. Michael Simpson. Their duties are to oversee the maintenance, organization, and use of the collection and to facilitate additions to the herbarium.

   The Herbarium is open by appointment only, so please contact us before coming to visit SDSU. Loans of specimens are available through registered herbaria upon request.

Contact Information for Loans or Inquiries:
Dr. Michael G. Simpson, Collections Manager
Dr. Lluvia Flores-Rentería, Curator

619-594-8012 (SDSU Herbarium)