Fl. forming a double triangle, 113 mm wide; perianth segments 42 mm long, very broadly ovate, blunt, mucronate, deep yellow, spreading, plane or with margins slightly incurved, smooth and of heavy substance, overlapping half; the inner segments narrower, shouldered at base, less prominently mucronate; corona 19 mm long, bowl-shaped, smooth, orange, with deep yellow at base and a band of red at rim, mouth narrowly flared, ribbed, lightly frilled, with rim dentate.

Named for a friend of registrant, Mark Gresh.