California oak woodland - Photo credit: John Game
About the Consortium

Major NSF grant received by the Consortium of California Herbaria

The Consortium of California Herbaria was developed to serve as a gateway to information from California vascular plant specimens that are housed in participant herbaria. The database now (January 2015) includes information from ~1.98 million specimens, all searchable through a single interface. Originally developed in 2003 around botanical collections from University of California herbaria, the Consortium continues to grow as more collections are added. Currently, collections from thirty-one institutions are accessible through this interface. The participating institutions cooperate under the guidelines of a Memorandum of Understanding. Participation as a data provider to the Consortium database is open to herbaria that meet these Minimum Requirements for data inclusion.

The data included in this database are a snapshot of the California vascular plant collections at partner institutions. More recent data may be available through the individual herbaria. Some participating herbaria have collections of fungi, lichens, and bryophytes; those specimens are not included here. The holdings of the participant herbaria are listed in a bar graph and a chart; the county record breakdown is depicted in a set of bar graphs. Operational details are available on a separate page.

Please send any feedback regarding the specimen data directly to the curator of each participating herbarium.

Georeferencing progress map (click for larger version)
Consortium georeferencing progress,

Geographic Data
Another goal of the consortium is to provide coordinate data (latitude/longitude) for as many California specimens as possible. Currently, specimens from all participating institutions are being georeferenced on a county-by-county basis. As of January 2015, ~1,402,000 records (over 70%) include latitude and longitude. Using BerkeleyMapper, the georeferenced records returned from any Consortium search can be mapped directly from the Consortium accession results page. Additional search options are available from the draft georeferencing tools page.

The Yellow Flag project is an effort to bring attention to incongruencies between georeferenced records and geographic ranges included in the Jepson eFlora. More information about yellow flags.

Curatorial Tools
Lists of new records, new determinations, duplicate records, graphs, comments, links.

Additional Information
More information on California plants may be found through the Jepson Online Interchange for California Floristics, a project of the Jepson Herbarium, UC Berkeley. The following information is available through the Interchange:
Nomenclature and taxonomy · Maps · Specimen records · Horticultural database · Photographs · Links from species pages to pertinent sites

California Digital Library; initial funding (2003–2006)
National Science Foundation; planning meeting (2006)
USDA Forest Service; georeferencing (2006 & 2007: Tehama, Trinity, Shasta, and Siskiyou counties)
Andrew W. Mellon Foundation; digitization of type specimens (2008–2013)
Global Biodiversity Information Facility; georeferencing records of non-native specimens (2008–2009)
Institute of Museum and Library Services (Museums for America program); databasing and georeferencing historical specimens collected in San Diego County (2005–2009).
National Science Foundation; databasing, georeferencing, and technical support (2010-2014), with an additional supplement in 2012

Please cite data retrieved from the Consortium database: Data provided by the participants of the Consortium of California Herbaria (

Data use policy
All users must follow the data use policy.

Consortium Contacts
Staci Markos, Administrative Co-Chair    (
Nancy Ruth Morin, Administrative Co-Chair    (
David Baxter, Technical Editor    (
Richard L. Moe, Emeritus Technical Editor    (
Ellen Dean, CCH representative to US Virtual Herbarium    (
Mare Nazaire, CCH representative for Southern California    (

Please send questions or comments regarding the development and use of these pages to David Baxter (


  Copyright © 2007 Regents of the University of California — Updated September 17, 2013