Hypnellaflavescens is the name of a species, part of the genus Hypnella.
This name is an alternative combination by A.Jaeger of an original description of species by Hook. & Grev. under the rules of the International Code of Nomenclature for algae, fungi, and plants (ICN / commonly called the botany code)..
Botany
Revisions
Hookeriaflavescens Hook. & Grev.Hookeriaflavescens is the combination used by Hook. & Grev. in the original description of the species.