Flora of the Southeastern United States – 2020 Edition

Alan S. Weakley

Produced from the FloraManager database system by Michael T. Lee

University of North Carolina at Chapel Hill Herbarium (NCU), North Carolina Botanical Garden, University of North Carolina at Chapel Hill

The 2020 edition of the Flora of the Southeastern United States, covering over 10,000 species, was published in October. The Flora covers the biogeographic region of the moist, relictual, unglaciated southeastern North America: south of the glacial boundary and east of the “dry line” to the west that marks a marked floristic boundary to the Great Plains prairies to the northwest and the Madrean woodlands and scrub to the southwest.  By states, this means that coverage includes the states of Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, New Jersey, North Carolina, Pennsylvania, South Carolina, Tennessee, Virginia, West Virginia, and the District of Columbia, and parts of Texas (the eastern Pineywoods, Coastal Prairies, Cross Timbers, Blackland Prairies, and South Texas Sand Sheet), Oklahoma (eastern Interior Highlands and Cross Timbers), Missouri (southern Interior Highlands), and Illinois, Indiana, and Ohio (southern unglaciated portions).

The Flora of the Southeastern United States is an open access, collaborative resource about the plants of the southeastern quarter of the United States. The Flora can be downloaded for free from the University of North Carolina’s North Carolina Botanical Garden’s website:

The Flora of the Southeastern United States – 2020 Edition

The NC Botanical Garden and UNC Chapel Hill Herbarium will publish 30 additional “derivative floras” covering smaller portions of the region (physiographic regions and states) that will be ‘handier’ for many users.

From Dr. Alan S. Weakley:
“As a reminder to those who have downloaded (or will download) the full Flora or who will download the derivative floras, we give it away for free not because it is so cheap, but because it is so valuable and important — that it should be open access.

However, it IS costly to develop and produce, and,

  1. if you value its contents (consider what you would pay for this amount of information in most floras), and
  2. especially if you use it for commercial purposes, and
  3. ONLY if you are able,
    … we encourage you to support the work that goes into this open access, collaborative resource about the plants of the southeastern quarter of the United States. We will use funds received to make the 2021 edition better and more responsive to your needs (let me know your wishes, at weakley at unc.edu). But please, donate if you can.”

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