Fl. 119 mm wide, ice white; perianth segments broadly ovate, blunt, slightly mucronate, slightly inflexed, plane, with margins occasionally a little incurling, overlapping half; the inner segments more narrowly ovate, more nearly acute, square-shouldered at base, inflexed at base, slightly reflexed at apex, a little concave; corona funnel-shaped, ribbed, with mouth expanded, rim widely rolled and minutely crenate.
Non ci sono le foto di "Matterhorn" in Daffseek.