Subordinate taxa within nothospecies may be recognized without an obligation to specify parent taxa at the subordinate rank. In this case non-hybrid infraspecific categories of the appropriate rank are used.
Mentha ×piperita f. hirsuta Sole; Populus ×canadensis var. serotina (R. Hartig) Rehder and P. ×canadensis var. marilandica (Poir.) Rehder (see also Art. H.4 Note 1).
When there is no statement of parentage, Art. H.4–5, governing the circumscription and appropriate rank of hybrid taxa, do not apply.
Art. H.11.2 and H.12.1 cannot both be applied simultaneously at the same infraspecific rank.
Names published at the rank of nothomorph1 are treated as having been published as names of varieties (see Art. 50).
1 Editions of the Code prior to that produced as a result of the Sydney Congress of 1981 permitted only one rank under provisions equivalent to Art. H.12. That rank was equivalent to variety and the category was termed “nothomorph”.
