Fl. forming a double triangle, 107 mm wide; perianth segments 47 mm long, broadly ovate, blunt, prominently mucronate, yellowish white, spreading, with margins incurling and with midrib showing, of heavy substance, overlapping one-third; the inner segments narrower, less prominently mucronate, inflexed; corona 14 mm long, bowl-shaped, smooth, brilliant yellow with moderate yellow-green at base and a band of orange at rim, mouth straight, narrowly ribbed, lightly frilled and irregularly lobed, with rim crenate.

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