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In botanical nomenclature, the ''ICBN'' prescribes a two-part name or 'binary name' for any taxon below the rank of genus down to, and including the rank of species. Taxa below the rank of species (infraspecific taxa) get a three part name (ternary name).
The ranks explicitly mentioned in the ''ICBN'' as having a binary name are:

★ subgenus

★ section

★ subsection

★ series

★ subseries

★ species
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A binary name consists of the name of a genus and an epithet.

★ In the case of a species this is a specific epithet:
:''Bellis perennis'' is the name of a species, with ''perennis'' the specific epithet. There is no connecting term involved, to indicate the rank

★ In the case of a subdivion of a genus (subgenus, section, subsection, series, subseries, etc) the name consists of the name of a genus and a subdivisional epithet. A connecting term should be placed before the subdivisional epithet to indicate the rank.
:''Paraserianthes'' sect. ''Falcataria''

Contents

More than two parts

See also

More than two parts

Sometimes a subdivision of a genus may be indicated with a listing in three or more parts. However, this is not its formal name. Its botanical name is in two parts.

See also

★ Scientific classification

★ Binomen — the term used in zoology for a two part name (restricted to species, only)

★ Binomial nomenclature