Updates are made as time allows.
Name changes may be either published changes or annotated existing collections of Howard Gentry, Harde LeSueur, Forrest Shreve and other historical collectors that have been cited in other works. Other Gentry collections after this publication are also used, but not all later Gentry numbers from the area are given. Included species are native, or introduced and are existing without human support. Vouchers and the herbarium of their disposition are eventually to be indicated for each species, with rare exceptions, which are accompanied with a brief explanation. Not all collections are given, but at least one example is eventually to be included from each state, when the plant has been found in both states.