CHAPTER III. NOMENCLATURE OF TAXA ACCORDING TO THEIR RANK

SECTION 5. NAMES OF TAXA BELOW THE RANK OF SPECIES (INFRASPECIFIC TAXA)

Article 25

25.1. For nomenclatural purposes, a species or any taxon below the rank of species is regarded as the sum of its subordinate taxa, if any. In fungi, a holomorph also includes its correlated form-taxa (see Art. 59).

Ex. 1. When Montia parvifolia (DC.) Greene is treated as comprising two subspecies, one must write M. parvifolia subsp. parvifolia for that part of the species that includes the nomenclatural type and excludes the type of the name of the other subspecies, M. parvifolia subsp. flagellaris (Bong.) Ferris. The name M. parvifolia applies to the species in its entirety.