Fl. 84mm wide; perianth segments 35.5mm long, broadly ovate, blunt, mucronate, greenish white 155C, spreading, plane, with margins incurved, with midrib showing, of heavy substance, overlapping half or more; the inner segments narrower, scarcely mucronate, shouldered at base; corona 9mm long, bowl-shaped, ribbed, brilliant greenish yellow 6C, with orange-red (32A) at rim and moderate yellow green 143D at base, mouth straight, wavy and lobed, with rim crenate. Strongly scented. Mid-season.

There are no photos of "Catherine of Claonaig" in Daffseek.