Fl. 102 mm wide; perianth segments 49 mm long, very broadly ovate, blunt, prominently mucronate, white, spreading to a little concave, plane, smooth, overlapping half or more; the inner segments narrower, less prominently mucronate, more nearly spreading; corona 10 mm long, bowl-shaped, closely, but lightly ribbed, vivid yellow, with a broad band of strong orange at rim, mouth widely expanded, neatly frilled, with rim crenate.

Named for the birthplace of Mrs. Abel Smith – Southwell, England.