You can browse though the hierarchy by clicking on the names below and drilling down. At each level the numbers of current species are given for each taxon. Only currently accepted names are currently included. Fossils are also currently included but only marginally affect the numbers.
Taxon Name or Authority:
Enter the taxon name (e.g., Rhodymeniaceae) or the authority (e.g., Harvey). The first three letters (e.g. "Rho" or "rho" for Rhodymenia) will often suffice.