The term "Heteropogon duncani" does not correspond to a widely recognized or established scientific name in current botanical or taxonomic literature.
Accurate information is not confirmed. "Heteropogon" is a genus of grasses in the family Poaceae, commonly known as "beard grass" or "kangaroo grass," with the most well-known species being Heteropogon contortus. However, "Heteropogon duncani" does not appear in authoritative taxonomic databases such as the International Plant Names Index (IPNI), Tropicos, or Plants of the World Online (POWO) as an accepted or validly published species.
It is possible that "duncani" refers to a specific epithet honoring an individual (possibly a botanist or collector with the surname Duncan), but no verifiable reference links this name to a formally described species within the genus Heteropogon. The term may represent a synonym, an unpublished or erroneous name, or a misidentification.
Due to the lack of reliable sources confirming its status, "Heteropogon duncani" is considered to have insufficient encyclopedic documentation. Further taxonomic verification would be required to determine its legitimacy or correct nomenclature.