Ptychomitriumdrouhardii is the name of a species, part of the genus Ptychomitrium.
This species has been described by Thér. under the rules of the International Code of Nomenclature for algae, fungi, and plants (ICN / commonly called the botany code).
Botany
Revisions
Brachysteleumdrouhardii Thér.Brachysteleumdrouhardii is the combination used by Thér. in the original description of the species.