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The United States, defined politically, is not a category used in the World Geographical Scheme for Recording Plant Distributions. In the WGSRPD, the flora of the United States is divided as follows.
- The Aleutian Islands and Alaska are included in Category:Flora of Subarctic America
- The contiguous United States is divided between
- Hawaii is included in Category:Flora of the Pacific
- The flora of other entities politically associated with the United States include:
- Category:Flora of American Samoa – part of Category:Flora of Samoa
- Category:Flora of Guam – part of Category:Flora of the Mariana Islands
- Category:Flora of the Northern Mariana Islands – part of Category:Flora of the Mariana Islands
- Category:Flora of Puerto Rico – part of Category:Flora of the Caribbean
- Category:Flora of the United States Virgin Islands – part of Category:Flora of the Leeward Islands