The CMBG herbarium was initiated in 2014 to document and preserve the plant biodiversity of coastal Maine and surrounding regions, especially northern New England. The collection contains specimens dating from the 1840s through the present day. About 80% of the collections are from Maine; the remaining 20% represents collections from 24 other states and several Canadian provinces. Well represented collectors include Edward B. Chamberlain, Donald S. Cameron, Melissa Dow Cullina, Alison Dibble, Merritt L. Fernald, Albion R. Hodgdon, Norman C. Fassett and David Potter. Less numerous, but significant in their historical importance, are collections by Kate Furbish and Aaron Young.

The Connecticut Botanical Society Herbarium houses over 36,000 sheets of plants, and records the changing distribution of the Connecticut flora. The CBS Herbarium is housed in the same facility as the Yale University Herbarium.

The Connecticut Botanical Society is a group of amateur and professional botanists who share an interest in the plants and habitats of Connecticut and the surrounding region. The society was founded in 1903. Our goals are to increase knowledge of the state's flora, to accumulate a permanent botanical record, and to promote conservation and public awareness of the state's rich natural heritage.

Founded in 1889. Housing approximately 15,000 specimens.  Half to two thirds from Vermont and one third to half from elsewhere.

An active collecting program adopted by both past and current faculty, staff and students in the University of Connecticut's Department of Ecology & Evolutionary Biology (EEB) has enriched the collections at CONN with a wealth of specimens from many world regions, which serve as a critical foundation for diverse scientific research activities. Notably, our specimen resources represent one of the most important research collections of native New England plants and include an excellent representation of the region's imperiled and invasive species. The CONN Herbarium, in conjunction with EEB, promotes the use of its collections as educational resources in plant biology.

The Oswego Herbarium is comprised of approximately 40,000 specimens with global distribution, dating from the early 1800s through the present. The greatest coverage is from upstate New York and the Lake Ontario region. The collection includes primarily vascular plants with a small bryophyte collection. A large portion of this collection is the orphaned Syracuse University Herbarium.

The OSW is in the process of being fully curated and digitized as part of NSF award #2204516.

The Louis-Marie Herbarium houses 750000 specimens among which 600000 are vascular plants. The collection also houses 135000 bryophytes and lichens, 13000 fungi as well as a collection of 2000 seeds. The Louis-Marie Herbarium prioritizes the collection of Arctic-alpine, subarctic and boreal species form Canada and the northern hemisphere. The digitization of the collection is a work in progress. This dataset includes more than 65000 specimens of vascular plants from the province of Quebec. / La collection de l'Herbier comprend au total près de 750000 spécimens dont 600000 plantes vasculaires, 135000 bryophytes et lichens, 13000 champignons ainsi qu'une collection de 2000 graines. L'Herbier accorde une priorité aux espèces arctiques-alpines, subarctiques et boréales du Canada et de l'hémisphère nord. Ce jeu de données comprend plus de 65000 spécimens de plantes vasculaires du Québec.

Northeastern United States, primarily Louis Calder Biological Field Station of Fordham University.

The vouchers for John Torrey's Flora of the State of New York (1843) formed the nucleus of the Herbarium. Because of the cultural and economic importance of the Albany-Troy area in the 19th century, the herbarium attracted collections of other early botanists, including material from Lewis Caleb Beck, Chester Dewey, H. P. Sartwell, Edward Tuckerman, Asa Gray, P. D. Kneiskern, among others. The herbarium also received important type specimens from M. A. Curtis, L. S. Rose, I. W. Clokey, C. F. Austin, B. D. Gilbert, C. S. Sheldon, E. Brainerd, C. S. Sargent, E. P. Bicknell, and H. M. Denslow. Throughout its history, the herbarium grew considerably from collections made by state botanists, Charles H. Peck, Homer D. House, Eugene C. Ogden, and Richard M. Mitchell and curators, Stanley J. Smith and Charles J. Sheviak.

Herbaria of 107000 vascular plants, and approximaltey 36000 lichens and bryophytes. Focus is on regional flora of Southern Ontario.

The Royal Botanical Gardens Herbarium (HAM) houses 62,000 accessioned vascular plant specimens from 191 families. After its founding in 1950, approximately 9,000 specimens were collected by Ecologist Aleksander Tamsalu over the course of a few years. The collection has a focus on the local floras of Burlington and Hamilton, Ontario, with approximately half of the collection from specifically within the Royal Botanical Gardens' Nature Sanctuaries and to a smaller degree, its cultivated areas. Notable specimens include nomenclatural standards of Syringa and type specimens of the Gentianaceae as described by Dr. James Pringle. HAM is the only Canadian herbarium to accept horticultural nomenclatural standards. HAM incorporated the herbarium of McMaster University, Hamilton College (MCM) in 1966. Other notable, historical collections include those of Christian Broun Ramsay, 9th Countess of Dalhousie, and of the Hamilton Association for the Advancement of Literature, Science and Art. HAM continues to accession an average of 385 specimens yearly.

Holdings include primarily vascular plants collected in Connecticut.

The Pringle Herbarium (VT) contains 300,000 specimens, including vascular plants, bryophytes, lichens, algae and fungi. Of these, this portal will contain all of our New England vascular plant specimens, expected to number about 81,000. Other digitization projects cover type specimens, non-New England vascular plant specimens, North American bryophytes and lichens, macroalgae and macrofungi. These images and data are available through various portals. The herbarium does not maintain its own online database.

Date Founded: 1861. Geography: Northeastern New York and adjacent states

Founded in 1864 by Daniel Cady Eaton from his personal library and plant collection, the Yale Herbarium is an internationally recognized repository with holdings of approximately 350,000 specimens from throughout the world. There are an estimated 5,000 type specimens. The collection is particularly rich in ferns, bryophytes and grasses, as well as in historically important materials from the early botanical collectors. In addition, it was the herbarium of record for the flora of southern New England from 1864 until 1955, when that function passed to the University of Connecticut at Storrs.