The Chico State Herbarium

The Chico State Herbarium has received NSF funding to digitize the university's plant collection as part of a large California wide collaboration to understand the effects of climate change on flowering time.  The Nation Science Foundation has awarded $1.8 million for this project, called Capturing California's Flowers.  The Chico State Herbarium is one of 22 participating herbaria throughout the state. Read more >>

A website has recently been created for this project, called CAP TCN, short for California Phenology Thematic Collections Network, at  More information coming soon!

Colleen Hatfield, director
The Chico State Herbarium

Chico State Herbarium 120,000 Speciman - Lowell AhartChico State Herbarium 120,000 Speciman - Lowell Ahart
The Chico State Herbarium passed another minor milestone by accessioning its 120,000th specimen – see the number 120,000 stamped in the middle of the Herbarium logo on the lower left side of the sheet in the left photograph. This specimen is another fine example of the collecting and specimen mounting of Lowell Ahart – his collection number 21,434 from last summer.

Located in Holt Hall room 129, the Herbarium is the most complete repository of plant specimens from northeastern California. The emphasis is on the northern California flora, and includes a great number of rare, threatened, and endangered plant species. Established with specimens donated by the late Professor Vesta Holt in the 1950's, the herbarium now contains more than 107,000 dried and mounted plant specimens. The majority of samples are flowering plants, conifers, and ferns, but bryophytes, lichens, and especially slime molds, are also well represented. The herbarium is used extensively for identification of sensitive and other plant species by various agencies and individuals. Loans of herbarium specimens are made to any higher academic institutions who request them.

Facilities available to visitors to the herbarium include the use of high-quality dissecting scopes, a compound microscope, an extensive reference library, an internet-connected computer, an internet connection for personal computers, and, with suitable training, access to the collection of specimens.

Users of the herbarium facilities and collection are encouraged to make plant collections during their field excursions and donate them to the herbarium. This is how the collection grows and increases its utility and importance to the whole botanical community.

Making a donation to the
CSU Chico Herbarium has
never been easier!

Herbarium Hours:
Fridays: 9am - 5pm


Join us at our annual meeting and open house, Saturday, October 27.

Annual Meeting: 4-5pm, Holt 170

Presentation: 5-6pm, Holt 170, "Cultivating Place: Leveraging Our Human Impulse to Garden in the Service of Plants" by Jennifer Jewell

Open House and Reception, 6:15pm, Holt 129: Taco Bar, Photo Event viewing, and presentation by 2018 Jim Jokerst Field Botany Award winner, Drew Bennett Gilberti!

Click for more info >>



The Friends of the Herbarium are currently hosting the 8th annual Native Plant Photo Event. Click for more info!



2018 Winner of the Jokerst Award:  Understanding Sweet Bottom-Up and Top-Down Trophic Cascades—Honey Dew Gall Wasp (Disholcaspis elderadensis), by Drew B. Gilberti studying with Dr. Chris Ivey.



Upcoming 2018 workshops from Friends of the Herbarium!

  • Oct 27th – Friends of the Chico State Herbarium Annual Meeting and Special Presentation
  • Nov 10th – Botanical Illustration

Visit the event calendar for more info!