A taxon concept server. It stores and qualifies recorded taxon names, providing an index for all name-annotated content.

From B&T World Seeds. This common name look-up lists about 25,000 common names for plants from a number of different languages.

From the International Organization for Plant Information. A global list of plant databases, to tell you who is putting together what data and where.

From the Polistes Foundation, it provides free on-line tools to identify species, teach and study nature's wonders, report findings, build maps, process images, and contribute to and learn from a growing, interactive encyclopedia of life with 1,419,246 species pages and 820,368 maps.

View data, media, articles, maps, and names.

An international network and data infrastructure funded by the world's governments and aimed at providing anyone, anywhere, open access to data about all types of life on Earth.

Resources for taxonomy of insects.

The authority table of botanical authors make use of the internationally accepted standards to verify the entry of author names in the type specimen and Gray Card Index databases in the Harvard University Herbaria.

Supporting global taxonomy and systematics of algae, fungi, and plants.

Database of the names and associated basic bibliographical details of all seed plants. Its goal is to eliminate the need for repeated reference to primary sources for basic bibliographic information about plant names.

Here you will find authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

A registry for all recorded taxon names.

From the International Society for Phylogenetic Nomenclature. The PhyloCode is a formal set of rules governing phylogenetic nomenclature, designed to name the parts of the tree of life by explicit reference to phylogeny.

Provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories.

An autonomous federation of taxonomic database custodians, involving taxonomists throughout the world.

From the Consortium for the Barcode of Life (CBOL). Search millions of species.

The project provides information about biodiversity, the characteristics of different groups of organisms, and their evolutionary history.

A relational database of phylogenetic information, includes all types of phylogenetic data (e.g., trees of species, trees of populations, trees of genes) representing all biotic taxa.

From UC-Berkeley's Museum of Paleontology. It is an index to the exhibits in their Phylogeny Wing.

Database sponsored by the University of Maryland and the International Association for Plant Taxonomy with cooperation from the National Agricultural Library.

Conference proceeding on classification.

Common names, scientific names, eponyms, synonyms, and etymology.

Information on classifying species.

Physical version also available.

Features a comprehensive double-referencing system, whereby plants with common names of more than one word are included under both the standard and inverted forms of their name.

Nomenclature dictionary.

Electronic version also available.

A compilation of generic names published for organisms covered by the International Code of Botanical Nomenclature.

The history of plant naming.

The work is arranged in four sections: the first section, vascular plant names, is a list of scientific names in alphabetical order by genus; the second is the common name index, which lists the common name followed by the scientific name; section three contains the important synonyms cross referenced to the accepted name; and the fourth lists the genera of vascular plants arranged by plant family.