Atlantic Provinces

Québec

New England

Hudson-Delaware

Middle Atlantic

Southern Atlantic

Florida

Ontario

Eastern Highlands
& Ohio

Illinois & Indiana

Western Great Lakes

Iowa & Missouri

Tennessee & Kentucky

Alabama & Mississippi

Arkansas & Louisiana

Northern Canada
& Greenland

Prairie Provinces

Northern Great Plains

Southern Great Plains

Texas

Colorado & Wyoming

Idaho &
Western Montana

New Mexico

Arizona

Great Basin

Alaska

British Columbia

Oregon & Washington

Northern California

Southern California

Baja California

Mexico

Central America

West Indies & Bermuda

Hawaii