| children | Get direct children | COL, NCBI, ITIS | 
| classification | Upstream classification | COL, NCBI, ITIS, Tropicos, EOL, GBIF, NBN | 
| comm2sci | Get scientific from common names | EOL, NCBI, ITIS, Tropicos | 
| downstream | Downstream taxa to specified rank | COL, ITIS, GBIF | 
| get_ids | Get taxonomic identifiers | COL, NCBI, ITIS, Tropicos, EOL, GBIF, NBN | 
| resolve | Resolve names using many resolvers | GNR, TNRS, iPlant | 
| gnr_resolve | Resolve names using Global Names Resolver | GNR | 
| tnrs | Phylotastic Taxonomic Name Resolution Service | NCBI, iPlant, MSW3 | 
| tol_resolve | Resolve names using any resolver | TOL | 
| iplant_resolve | iPlant name resolution | iPlant | 
| sci2comm | Get common from scientific names | EOL, NCBI, ITIS | 
| synonyms | Retrieve synonyms given input names/identifiers | COL, NCBI, ITIS, Tropicos | 
| upstream | Retrieve upstream taxa given names/identifiers | COL, ITIS | 
| lowest_common | Retrieve the lowest common taxon and rank for a given taxon name or ID | COL, ITIS, GBIF, TOL, NCBI | 
| genbank2uid | Get NCBI taxonomy UID from GenBankID | NCBI | 
| tax_name | Get taxonomic names for a given rank | NCBI, ITIS | 
| tax_rank | Get rank for a given taxonomic name | BOLD, COL, EOL, GBIF, NATSERV, NBN, TOL, TROPICOS, ITIS, NCBI, WORMS | 
| tpl_get | Get The Plant List csv files | TPL |