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Intermountain Herbarium


  • To serve as a primary source of information on the flora and fungi of the Intermountain region, both native and introduced
  • To foster increased understanding and appreciation of the floristic diversity of the Intermountain Region

Summer Hours
May 5 - September 2
Tuesday - Friday 8am-5pm
Closed Mondays & Holidays

2014 Utah Botanical Foray
Date: August 1-4. Where: Uinta Mountains - Spirit Lake region
More details to come.

Recent news and events
2013 - Another banner year. We added over 6,967 specimens to the collection, almost doubling our previous record. We added 8,105 to the regional and taxonomic networks to which the herbarium belongs and imaged 7,999 vascular plant specimens, both numbers exceeding the numbers for the previous years. At the end of the year, the herbarium had ~267,194 specimens of which 119,189 had been databased.

Working with inmates. Part of our success in 2013 is attributable to the inmates in the Daggett County Jail who have been assisting use in databasing our specimens. This is possible through the support of Ms Sara Wilkinson-Lamb, adult education specialist with the Manila School District, the School Superintendent, and the Daggett County Sheriff, Sheriff Jorgensen. The other part of last year's success is attributable to our student workers.

The Intermountain Regional Web Site now brings you over 2.5 million records from over 60 herbaria. Most of these herbaria are outside the Intermountain Region but nearly all herbaria have some specimens from outside their own region. By contributing their records available to a single network, they offer their users more resources than any one herbarium could provide.

New Regional Web Site now brings you records from herbaria in North Dakota, South Dakota, Nebraska, Kansas, Minnesota, Iowa, Illinois, Missouri, and Texas. Some herbaria are just getting started on digitization- but they are getting started; others are well on their way. Link to site [Nov. 07, 2013]

Svalbard [Norway] Seed Bank [video, downloaded 25 June, 2013]

Bioluminescent fungi [BBC news, Jan 16, 2013]

Grass makes tires greener [Economist, Jan. 5, 2013]

Older News & Events can be found here

Identification keys: A multiaccess key to the genera of spore-bearing vascular plants (lycophytes, ferns, and horsetails) in the region has been added to the keys made available last year. All are rather plain in appearance at present - and all require Java.

Regional Web Site Link to site.

More networks: The Intermountain Herbarium is contributing records to four networks, for bryophytes, fungi, lichens, and vascular plants of the Southwest, Southeast, Intermountain, Northern Great Plains, and Rocky Mountain Region. All four networks use the SYMBIOTA software so if you learn how to use one, you can use them all. The links will take you to each site.

Now available : Manual of grasses for North America; Grasses of the Intermountain Region. The manual has now been reprinted. The second printing has been spirally bound. No other changes have been made.

Pictures from the celebration of our 250,000th specimen.

Special Features
Fun Facts About Fungi; Interactive keys; Fact Sheets; Grass treatments for North America; Intermountain Fern Guide (.pdf).

NOW! Look for us on Facebook!

CITES permit # 10US008768/9

The herbarium is located in The Junction basement. Its mailing address is 5305 Old Main Hill, Utah State University, Logan, Utah 84322-5305. Do not look for Old Main Hill when you arrive in town. It is a fiction. Go to the map and look for the basement of the Junction.

Mailing Address
5305 Old Main Hill, Utah State University, Logan, Utah 84322-5305.

The herbarium WELCOMES visitors. It is open from 8 am- 5 pm during the week. If research workers visiting the region cannot make it during these hours, they should contact Mary Barkworth. We shall try to accommodate your needs.

Items for Sale
The herbarium is selling note cards with illustrations of grasses and attractive prints made from some of its specimens. All proceeds go to the herbarium.

Also: Set of eight different note cards featuring Utah Grasses. Cost $8 per set plus postage and handling. Order by contacting Michael Piep.

Director:  Mary Barkworth   435-797-1584 or
Assistant Curator:  Michael B. Piep   435-797-0061

Intermountain Herbarium, Utah State University,
5305 Old Main Hill, Logan, Utah 84322-5305<

Other Local Events and Activities:

Cache Chapter - Utah Native Plant Society

To join the Utah Native Plant Society, go to the UNPS store. Make sure you specify Cache as the chapter you wish to join.

Many members have lapsed memberships, please renew them!

Contact Michael Piep for more chapter information at 797-0061 or michael.piep[at]

Find us on FACEBOOK!

Bridgerland Mushroom Society Activities



Meetings and forays are announced and scheduled on the BMS Facebook page.

For more information about their activities or to join contact them at mpiep[at] (subject line - BMS info). Find us on FACEBOOK!