Fl. forming a double triangle, 105mm wide; perianth segments 42mm long, ovate, blunt, prominently mucronate, spreading, concave, with midrib showing, of heavy substance, overlapping half; the inner segments narrower, scarcely mucronate; corona 14mm long, bowl-shaped, smooth, mouth straight, wavy to lightly frilled, lobed, with lobes overlapping, with rim minutely crenate. Late.

There are no photos of "Surlingham Broad" in Daffseek.