Humid Subtropical North America

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Climate Regions of the United States

Humid Subtropical North America is a Gulf Type Warm Temperate Eastern Margin Climate biome that roughly covers the North American "South" or "Southeast". This includes Oklahoma, east Texas, Louisiana, Arkansas, the southern perimeter of Missouri, Mississippi, Tennessee, Kentucky, Alabama, Georgia, South Carolina, North Carolina, Virginia, east Maryland, Delaware, south New Jersey, most of Florida, as well as high altitude regions in eastern Mexico, primarily on the eastern slopes of the Sierra Madre Oriental. Many other regions of the world have humid subtropical climates, with closely relative plant species.

Part of the goal of this network is to:

1. Preserve native and naturalized crops of humid subtropical North America, including many crops historically from the Southern United States, and Native American nations but also globally rare or endangered varieties of Cfa Trewartha classified zones;

2. Store the seeds at 4°C and select from decennial plant growouts in hardiness zones 7, 8 and 9, thereby adapting them to local climates and soils, and increasing their genetic diversity.