Fl. rounded, 100 mm wide; perianth segments very broadly ovate, blunt, vivid yellow, with slight white mucro, inflexed, concave, smooth and of heavy substance, overlapping half; the inner segments narrower, more strongly inflexed, creased at midrib; corona funnel-shaped, ribbed, darker in tone than the perianth segments, mouth expanded and a little frilled, with rim deeply notched and dentate.

There are no photos of "Hiraizumi" in Daffseek.