subspecific

sub- +‎ specific

subspecific (not comparable)

1. (taxonomy) pertaining to a subspecies. (See Usage notes.)
2. (taxonomy) infraspecific. (See Usage notes.)

Formal usage (that is, as a term of formal nomenclature referring to the taxonomic rank of subspecies) is only in zoology and bacteriology, not in botany, although informal usage is not restricted. When the meaning of infraspecific is meant (that is, pertaining to any taxon at a rank lower than species), it is preferable to say infraspecific (because the main word sense of subspecific refers more particularly to subspecies per se), although the broad usage is venial.

• subspecific epithet
• subspecific name