Fl. 100mm wide; perianth segments 41mm long, broadly ovate, blunt, mucronate, brilliant yellow 8A, spreading, plane or with margins a little incurved, with midrib showing, of heavy substance, overlapping one third; the inner segments narrower, shouldered at base, less prominently mucronate; corona 10mm long, bowl- to disc-shaped, ribbed, vivid yellow, mouth expanded, lightly frilled and irregularly lobed, with rim crenate. Sunproof. Sweetly scented.

Named for William James Moore, the hybridizer’s grandson.