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U.S. Endangered Species List: Flora—plants Species Search at U.S. Fish & Wildlife Service Electronic Code of Federal Regulations: "List of endangered species"
The Trees of North America. For the purposes of this category, "North America" is defined in accordance with the World Geographical Scheme for Recording Plant Distributions (WGSRPD), which calls it Northern America, namely as one of the nine "botanical continents". It includes the following regions:
Silvics of North America (1991), [2] [3] a forest inventory compiled and published by the United States Forest Service, includes many hardwood trees. [ a ] It superseded Silvics of Forest Trees of the United States (1965), which was the first extensive American tree inventory. [ 6 ]
Modoc National Forest contains the Medicine Lake Volcano, which has an elevation of 7,921 ft (2,414 m) and is the largest shield volcano in North America. There are 43,400 acres (17,600 ha) of old-growth forest here along with Mill Creek Falls in the South Warner Wilderness .
About 3,800 additional non-native species of vascular plants are recorded as established outside of cultivation in the U.S., as well as a much smaller number of non-native non-vascular plants and plant relatives. The United States possesses one of the most diverse temperate floras in the world, comparable only to that of China.
Forests in Hawaii and the U.S. territories are tropical. [5] The most heavily forested regions of the U.S. are Maine, New Hampshire, American Samoa, the Northern Mariana Islands and West Virginia; the least heavily forested regions are North Dakota, Nebraska, and South Dakota. [2]
The Flora of North America North of Mexico (usually referred to as FNA) is a multivolume work describing the native plants and naturalized plants of North America, including the United States, Canada, St. Pierre and Miquelon, and Greenland. It includes bryophytes and vascular plants.
The Eastern Temperate Forests of North America are a vast and diverse region. Stretching inland from the Atlantic coast about 385 miles (620 km), they reach from Michigan in the north and Texas in the south; they cover the land of New England to Florida, Alabama to Michigan, and Missouri to the Appalachian Mountains.