Authorship of Subsidiary Ranks
According to the botanical Code it is only necessary to cite the author for the lowest rank of the taxon in question, i.e. for the example subspecies given above (Helianthemum apenninum subsp. rothmaleri) it is not necessary (or even recommended) to cite the authority of the species ("Mill.") as well as that the subspecies, though this is found in some sources. The only exception to this rule is where the nominate variety or subspecies of a species is cited, which automatically will inherit the same authorship of its parent taxon, thus:
- Rosa gallica L. var. gallica, not "Rosa gallica var. gallica L."
Read more about this topic: Author Citation (botany)
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