Welcome to the
Norton-Brown Herbarium (MARY)

    The Norton-Brown Herbarium (Herbarium code MARY) is administered by the Department of Plant Science and Landscape Architecture in the College of Agricultural and Natural Resources at the University of Maryland College Park. MARY is home to a natural heritage collection that includes ~87,000 specimens of flowering plants, cone-bearing plants, algae, mosses, liverworts, lichen, and fungi. Established in 1901, the Norton-Brown Herbarium holds the largest number of specimens from Maryland, and the mid-Atlantic and also has a diverse collection of preserved plants from all over the world. The collections housed here were instrumental in developing the flora treatments Woody Plants of Maryland (Brown & Brown 1972) and Herbaceous Plants of Maryland (Brown & Brown 1984).

State Botanist Chris Frye and the herbarium staff doing field work.

    The herbarium is used by professionals, students, citizen scientists, and volunteers who represent academic institutions, conservation groups and federal and state agencies. We host in-house and visiting researchers working on treatments of particular plant groups or on regional floras, and undergraduate and graduate students doing research on plants and plant communities. The specimens are also used by arborists, horticulturists, members of garden clubs, conservation groups and consultants. The collections are an irreplaceable source of data on where species occurred at different times, yielding critical information on changes in distributions of invasive and rare species. The collections are also useful for helping to identify plants in that they provide the reference against which one can confirm a tentative identification.

    We welcome volunteers who want to get involved in science at the herbarium. Contact us to find out how you can help.

What's New

April 2016
Maryland Day 2016

October 2015
Plant of the Month:
Climacium americanum

October 2014
Herbarium Display at
the AGNR Open House

Education at
the Herbarium

Maryland Day
Herbarium Activities

Presentation at the
2013 ASB meeting

Collaboration on Asclepias
and Monarch Butterfly

Presentation to the
Botanical Society
of Washington

Maryland Native
Plant Society Walk -
‘Winter Greens’

Presentation on
virtual herbarium
progress at MISC

Bioscience Research and Technology Day 2012

AGNR Open House

Annual Conference
of the Maryland
Native Plant Society

Arboretum walk featuring the Norton-Brown Herbarium

Kew Herbarium Techniques
course at Brooklyn
Botanic Garden, NY