Fl. 120 mm wide; perianth segments broadly or very broadly ovate, blunt, fairly prominently mucronate, sulfur yellow, spreading, slightly twisted, creased, overlapping one-third to a half; the inner segments with margins wavy; corona broad funnel-shaped, darker in tone than the perianth segments, with mouth expanded and frilled, rim deeply and repeatedly notched and crenate.

There is a question if this is the same as Nimrod?

According to The American Horticultural Society’s 1937 issue of the The American Daffodil Year Book, Guy L. Wilson’s article “Some Modern Daffodils for Garden Decoration” states: “Carlton will appeal to those who like size, though very large its soft clear yellow flowers, with their wide gracefully frilled crowns, are quite will balanced, it is a plant of immense vigor and rapid increase, making hard healthy bulbs.”