Adams State University Herbarium

Bitterroot National Forest Herbarium

Bureau of Land Management, Grand Junction Field Office Herbarium

City of Boulder Herbarium

Colorado College, Carter Herbarium

Colorado Mesa University, Walter A. Kelley Herbarium

Colorado State University - Pueblo

Colorado State University, Charles Maurer Herbarium

Denver Museum of Nature and Science Herbarium

Devils Tower National Monument

Florissant Fossil Beds National Monument

Fort Laramie National Historic Site

Fort Lewis College Herbarium

Kathryn Kalmbach Herbarium

Mesa Verde National Park

Rocky Mountain Biological Laboratory

Rocky Mountain Biological Laboratory - Pollen

Rocky Mountain Herbarium

Trinidad State College

University of Calgary Herbarium

University of Colorado Museum of Natural History Herbarium Vascular Plant Collection

University of Northern Colorado Herbarium

Western State Colorado University

Arizona State University Vascular Plant Herbarium

Arizona Western College Herbarium

Arizona-Sonora Desert Museum

Boyce Thompson Arboretum

Bureau of Land Management, Las Cruces District Office

Cochise County Herbarium - Arizona State University

Coconino National Forest Herbarium

Coronado National Forest Herbarium

Deaver Herbarium (Northern Arizona University)

Desert Botanical Garden Herbarium

Eastern New Mexico University Herbarium

Gila National Forest Herbarium

Grand Canyon National Park

Jemez Mountain Herbarium

Kaibab National Forest Herbarium

Museum of Northern Arizona

Natural History Institute Herbarium

Navajo Nation Herbarium

New Mexico State University Herbarium

New Mexico State University Range Science

Pipe Spring National Monument

Prescott National Forest Herbarium

RL Minckley Plant Collection

San Juan College Herbarium

Santa Fe Botanical Garden Herbarium

Southwestern Regional Forest Service Herbarium

Southwestern Research Station

The Arboretum at Flagstaff Herbarium

University of Arizona Herbarium

University of New Mexico Herbarium

US Forest Service - Tonto National Forest

Western New Mexico University, Dale A. Zimmerman Herbarium

Arizona State University Fruit and Seed Collection

Arizona State University Pollen Collection

ASU-NEON Aquatic Plant, Bryophyte, and Macroalgae Collection (Herbarium Vouchers [Clip Harvests])

ASU-NEON Aquatic Plant, Bryophyte, and Macroalgae Collection (Herbarium Vouchers [Point Counts])

ASU-NEON Aquatic Plant, Bryophyte, and Macroalgae Collection (Herbarium Vouchers [Standard Sampling])

ASU-NEON Terrestrial Plant Collection (Herbarium Vouchers)

Canadian Museum of Nature

University of Calgary Herbarium

University of Lethbridge Herbarium

University of Manitoba Vascular Plant Herbarium

Albion College

Amway Herbarium

Augustana College

Butler University, Friesner Herbarium

Calvin College

Central Michigan University Herbarium

Chicago Academy of Sciences, Botany Collection

Chicago Botanic Garden

Cincinnati Museum Center, Cincinnati Museum of Natural History

Eastern Illinois University, Stover-Ebinger Herbarium

Eastern Michigan University Herbarium

Field Museum of Natural History

Grand Valley State University

Hillsdale College Herbarium

Hope College

Huntington University Herbarium

Illinois Natural History Survey

Indiana University Herbarium, Deam Herbarium

Indiana University Southeast Herbarium

Kent State University Herbarium

Loyola University Chicago Herbarium

Miami University, Willard Sherman Turrell Herbarium

Michigan State University

Milwaukee Public Museum

Missouri Department of Natural Resources, Division of State Parks Herbarium

Morton Arboretum

Morton Arboretum - in process of being digitized

Muskegon Community College Herbarium, Michigan

Northern Illinois University Herbarium

Northland College

Oakland University Herbarium Collection

Ohio State University Herbarium

Ohio University, Bartley Herbarium

Seney National Wildlife Refuge

Southeast Missouri State University Travis Brooks Herbarium

University of Cincinnati, Margaret H. Fulford Herbarium - Vascular Plants

University of Illinois Herbarium

University of Michigan Herbarium

University of Minnesota Herbarium

University of Notre Dame, Greene/Nieuwland Herbarium

University of Wisconsin - Eau Claire Herbarium

University of Wisconsin - Green Bay

University of Wisconsin - Oshkosh, Neil A. Harriman Herbarium

University of Wisconsin - Whitewater Herbarium

University of Wisconsin-LaCrosse

University of Wisconsin-Madison, Wisconsin State Herbarium

University of Wisconsin-Milwaukee

University of Wisconsin-Stevens Point, Robert W. Freckmann Herbarium

Valparaiso University Herbarium

Western Illinois University, ​R. M. Myers Herbarium

Western Michigan University

Brown University Herbarium

Harvard University Herbaria: Vascular Plants of North America

University of Vermont, Pringle Herbarium

Yale University Herbarium, Peabody Museum of Natural History (Yale Peabody Museum of Natural History-YU)

Nevada State Museum Herbarium

Brigham Young University, S. L. Welsh Herbarium

Bureau of Land Management, Caliente Field Office Herbarium

Bureau of Land Management, Carson City District Herbarium

Bureau of Land Management, Uinta Herbarium

Dinosaur National Monument Herbarium

Eastern Nevada Landscape Coalition - Gregory G. Gust Herbarium

Elko BLM District Office Herbarium

Elko Forest Service Herbarium

Ely BLM Herbarium

Fish Springs National Wildlife Refuge Herbarium

Humboldt-Toiyabe Headquarters Herbarium

Intermountain Herbarium (Vasc. & Algae)

Natural History Museum of Utah, Garrett Herbarium

Nevada Department of Agriculture Herbarium

Nevada Operations Office, Department of Energy

Salt Lake City Parks and Public Lands Herbarium

Shrub Science Laboratory, Rocky Mountain Research Station

Snow College Herbarium

Southern Utah University

Swaner Preserve and EcoCenter

University of Nevada Herbarium

University of Nevada, Las Vegas; Wesley E. Niles Herbarium

Utah State University Eastern

Utah State University Uintah Basin

Utah Tech University Herbarium

Utah Valley University Herbarium

Washington State University Marion Ownbey Herbarium

Weber State University Herbarium

Zion, Bryce, and Cedar Breaks Herbaria

Academy of Natural Sciences of Drexel University

Carnegie Museum of Natural History Herbarium

Columbia-Greene Community College Natural History Museum Herbarium

Delaware State University, Claude E. Phillips Herbarium

Herbarium of the Natural History Museum at the Tom Ridge Environmental Center

Howard University Herbarium

Indiana University of Pennsylvania, A.G. Shields Herbarium

Maryland Department of Natural Resources

Morris Arboretum of University of Pennsylvania

Muhlenberg College

New York Botanical Garden Steere Herbarium

Pennsylvania State University Herbarium

Rochester Academy of Science Herbarium

Rutgers University, Chrysler Herbarium

Shippensburg University Herbarium

Slippery Rock University in Pennsylvania

Staten Island Museum

SUNY Plattsburgh Herbarium

The College of New Jersey Herbarium

Towson University

University of Maryland, Norton-Brown Herbarium

William Darlington Herbarium - West Chester University, Pennsylvania

Archbold Biological Station

Austin Peay State University Herbarium

Bennington College Herbarium

Bureau of Land Management, Redding Field Office Herbarium

Bureau of Land Management, San Luis Valley Field Office

Jewell and Arline Moss Settle Herbarium at SUNY Oneonta

Kelley Botanical Library

Mesa Verde National Park

Patuxent Research Refuge, Maryland

Sagehen Herbarium

Tall Timbers Research Station

Trinidad State College

University of Lethbridge Herbarium

University of Manitoba Vascular Plant Herbarium

University of Vermont, Pringle Herbarium

Yukon University Herbarium

Drury University Herbarium

Benedictine College Herbarium

Black Hills State University Herbarium

Chadron State College, High Plains Herbarium

Cornell College Herbarium

Dickinson State University Herbarium

Fort Hays State University Herbarium

Iowa State University, Ada Hayden Herbarium

Luther College

Minot State University

Missouri Botanical Garden

Montana State University - Northern Herbarium

Montana State University Billings

North Dakota State University Herbarium

Northern State University Herbarium

Pittsburg State University, Theodore M. Sperry Herbarium

Putnam Museum and Science Center

Saint Ambrose University Herbarium

South Dakota State University, C. A. Taylor Herbarium

University of Kansas Ronald L. McGregor Herbarium

University of Nebraska at Kearney Herbarium

University of Nebraska State Museum, C.E. Bessey Herbarium

University of Northern Iowa, Grant Herbarium

Wartburg College

Washburn University

William Jewell College Herbarium

California Botanic Garden Herbarium

California Polytechnic State University, Robert F. Hoover Herbarium

California State University, Long Beach Herbarium

Granite Mountains Desert Research Center

Huntington Botanical Gardens Herbarium

Klamath National Forest Herbarium

Oregon State University

Pacific Union College Hebarium

San Diego Natural History Museum

San Diego State University Herbarium

San Jose State University, Carl W. Sharsmith Herbarium

Santa Barbara Botanic Garden, Clifton Smith Herbarium

Santa Cruz Island Reserve Herbarium

Sierra Pacific Industries-Forestry

UCSC Herbarium, Kenneth S. Norris Center for Natural History, University of California, Santa Cruz

University of Alaska Museum

University of California at Davis Herbarium

University of California, Riverside Plant Herbarium

Herbario CFNL de la Universidad Autónoma de Nuevo León

Herbario "Luz María Villarreal de Puga" de la Universidad de Guadalajara

Herbario Alfredo Barrera Marín

Herbario Annetta Mary Carter

Herbario de la Facultad de Ciencias Biológicas y Agropecuarias de la Universidad Veracruzana

Herbario de la Unidad Regional Universitaria de Zonas Áridas

Herbario de la Universidad Autónoma de Aguascalientes

Herbario de la Universidad Autónoma de Baja California

Herbario de la Universidad Autónoma del Estado de Hidalgo

Herbario de la Universidad de Colima

Herbario de la Universidad de Sonora

Herbario del Centro de Investigación en Alimentación y Desarrollo, A.C.

Herbario del Estado de Zacatecas

Herbario del Jardín Botánico BUAP, Puebla, Mexico

Herbario del Jardín Botánico Culiacán

Herbario Dr. Jerzy Rzedowski Rotter

Herbario Francisco González Medrano

Herbario Isidro Palacios

Herbario Jerzy Rzedowski

Herbario Jesús González Ortega

Herbario Jorge Arturo Alba Avila

Herbario Mtra. Graciela Calderón Díaz-Barriga y Dr. Jerzy Rzedowski

Herbario Nacional de México

Herbario Walter L. Meagher, Jardín Botánico El Charco del Ingenio

Herbario-Hortorio CHAPA

Appalachian State University, I. W. Carpenter, Jr. Herbarium

Arkansas Natural Heritage Commission Herbarium

Arkansas State University

Arkansas Tech University Herbarium

Armstrong State University Herbarium

Auburn University at Montgomery Herbarium

Auburn University, John D. Freeman Herbarium

Austin Peay State University Herbarium

Berea College, Ralph L. Thompson Herbarium

Berry College Herbarium

Bridgewater College Herbarium

Broward College Botanical Collection

Burgundy Center for Wildlife Studies, Coopers Cove Herbarium

Campbell University Herbarium

Catawba College Herbarium

City of Alexandria Herbarium

Clemson University Herbarium

Coastal Carolina University Herbarium

Columbus State University Herbarium

Converse College Herbarium

Dalton State College Herbarium

Delta State University

Duke University Vascular Plant Collection

East Carolina University Herbarium

East Tennessee State University, John C. Warden Herbarium

Eastern Kentucky University, Ronald L. Jones Herbarium

Emory University Herbarium

Eno River State Park Herbarium

Fairchild Tropical Botanic Garden

Florida Department of Agriculture and Consumer Services, Division of Plant Industry

Florida State University, Robert K. Godfrey Herbarium

Fort Polk United States Army Base Herbarium

Francis Marion University Herbarium

Furman University, Ives Herbarium

George Mason University, Ted R. Bradley Herbarium

Georgia Southern University Herbarium

Georgia Southwestern State University Herbarium

Grand Bay National Estuarine Research Reserve Herbarium

Great Smoky Mountains National Park

Henderson State University Herbarium

Hendrix College Herbarium - Vascular Plants

Highlands Biological Station Herbarium

Hot Springs National Park Herbarium

Institute for Botanical Exploration

Jacksonville University Herbarium

James Madison University Herbarium

Jones Center at Ichauway Herbarium

Kennedy Space Center Herbarium

Longwood University, Harvill-Stevens Herbarium

Lord Fairfax Community College Herbarium

Louisiana State Arboretum

Louisiana State University of Alexandria Herbarium

Louisiana State University Shreveport, D. T. MacRoberts Herbarium

Louisiana State University, Shirley C. Tucker Herbarium

Louisiana Tech University Herbarium

Lynchburg College, Ramsey-Freer Herbarium

Marie Selby Botanical Gardens Herbarium

Marshall University

Mecklenburg County Park and Recreation Herbarium

Middle Tennessee State University

Mississippi Museum of Natural Science Herbarium

Mississippi State University

Morehead State University Herbarium

Murray State University Herbarium

Newberry College Herbarium

Nicholls State University Herbarium

North Carolina Museum of Natural Sciences Herbarium

North Carolina State University Vascular Plant Herbarium

North Carolina Zoological Park

Northern Kentucky University, John W. Thieret Herbarium

Old Dominion University Herbarium

Petersburg Garden Club Herbarium

Raven Rock State Park Herbarium

Rhodes College Herbarium

Salem College

Silver Bluff Audubon Center Herbarium

Southeastern Louisiana University, Glen N. Montz Herbarium

Southern Forest Range Program Herbarium

Southern Illinois University Herbarium

St. Andrews University Herbarium

Stoneville Weed Science Laboratory Herbarium

Suwannee River Regional Library Herbarium

Tennessee Technological University, Hollister Herbarium

Troy University Herbarium

University of Alabama Herbarium

University of Arkansas at Monticello

University of Arkansas Herbarium

University of Central Arkansas Herbarium

University of Central Florida Herbarium

University of Florida Herbarium

University of Georgia Herbarium

University of Kentucky Herbarium

University of Louisiana at Lafayette Herbarium

University of Louisiana at Lafayette Ornamental Horticulture Herbarium

University of Louisiana at Monroe Herbarium, R. Dale Thomas Collection

University of Mary Washington Herbarium

University of Memphis Herbarium

University of Mississippi, Thomas M. Pullen Herbarium

University of North Carolina at Chapel Hill Herbarium: Vascular Plants

University of North Carolina at Pembroke Herbarium

University of North Carolina, Asheville

University of Richmond Herbarium

University of South Alabama Herbarium

University of South Carolina Salkehatchie Herbarium

University of South Carolina Upstate Herbarium

University of South Carolina, A. C. Moore Herbarium Vascular Plant Collection

University of South Florida Herbarium

University of Southern Mississippi Herbarium

University of Tennessee Martin Herbarium

University of Tennessee Vascular Herbarium

University of Tennessee, Chattanooga

University of the South - Sewanee Herbarium

University of West Florida

University of West Georgia Herbarium

US Army Corps of Engineers Engineer Research and Development Center Herbarium

Valdosta State University Herbarium

Vanderbilt University Herbarium

Virginia Commonwealth University Herbarium

Virginia Military Institute Herbarium

Virginia Polytechnic Institute and State University, Massey Herbarium

Virginia State University Herbarium

Volunteer State Community College Herbarium

Wake Forest University

Warren Wilson College Herbarium

West Virginia Natural Heritage Program Herbarium

West Virginia University Herbarium

West Virginia Wesleyan College, George B. Rossbach Herbarium

Western Carolina University Herbarium

Weymouth Woods Sandhills Nature Preserve Herbarium

William & Mary Herbarium

Winthrop University Herbarium

Abilene Christian University Herbarium

Angelo State University Herbarium

Balcones Canyonlands National Wildlife Refuge, U.S. Fish and Wildlife Service

Baylor University Herbarium

Botanical Research Institute of Texas, Philecology Herbarium

Cameron University

East Central University

Fort Worth Nature Center and Refuge Herbarium

Hardin-Simmons University Herbarium

Howard Payne University Herbarium

Lady Bird Johnson Wildflower Center Herbarium

Lundell Herbarium at the University of Texas at Austin

Northeastern State University, Joe M. Anderson Herbarium

Oklahoma City University Herbarium

Oklahoma State University Herbarium

Our Lady of the Lake University Herbarium

Saint Edward's University Herbarium

Southeastern Oklahoma State University

Sul Ross University, A. Michael Powell Herbarium

Tarleton State University Herbarium

Texas A&M University, S.M. Tracy Herbarium

Texas A&M University-Corpus Christi, Ruth O'Brien Herbarium

Texas Lutheran University Herbarium

Texas Tech University, E. L. Reed Herbarium

Texas Woman's University Herbarium

University of Central Oklahoma Herbarium

University of Houston Coastal Center Herbarium

University of Louisiana at Monroe Herbarium, R. Dale Thomas Collection

University of North Texas, Benjamin B. Harris Herbarium

University of Oklahoma, Robert Bebb Herbarium

University of Science and Arts of Oklahoma

University of Texas at Austin Herbarium

University of Texas at El Paso Biodiversity Collections Herbarium

University of Texas Permian Basin, Edwin B. Kurtz Herbarium

University of Texas Rio Grande Valley

University of Tulsa, Barclay Herbarium

Vanderbilt University Herbarium

West Texas A&M University Herbarium

Indiana Photographic Scavenger Hunt

iNaturalist Observations

Prairie Fen Biodiversity Project

Bureau of Land Management - New Mexico State Offices

Kartchner Caverns State Park - Cacti & Succulents Inventory

Madrean Archipelago Biodiversity Assessment Observations

Madrean Discovery Expeditions

Registro de Datos de Avistamiento de Universidad de la Sierra

Sonoran Desert Plants: An Ecological Atlas

Southwest Seed Partnership

General Research Observations

Observaciones Generales de Flora del Noroeste de México