The New England Botanical Club herbarium, which has proven to be the most important resource for this project, is especially eager to receive specimens documenting range extensions. We also would like to be informed of such specimens in other herbaria. Similarly, because the atlas of the New England flora will be continuously updated as new information becomes available, we are eager to receive notification of published corrections of cytological information and new, documented chromosome counts for taxa in the New England flora. The taxonomy and nomenclature adopted for this work essentially follow that of the Flora North America project in progress, except that families, genera and species are arranged alphabetically. Named and unnamed hybrid taxa are placed alphabetically at the end of the genus.
Unnamed hybrids combine the names of the progenitors alphabetically by epithet.
Taxa that are not native to New England are indicated by uppercase text. Unpublished names are not used, even if publication is pending. Very few of the counts are based on material from New England, but instead reflect counts made from throughout the range of the taxon. Synonyms have not been provided where the distribution for the synonymized name does not include New England. We thank the curators and directors of the herbaria of Harvard University, the University of Maine, University of Massachusetts and the University of Vermont for allowing us access to their collections.