Gladiolus equitans flower, little yellow, much white

This Gladiolus equitans flower lifted its dorsal tepal sufficiently for exposing its white inside surface. The upper three tepals are all larger than the lower trio.

The cluster of three stamens and the style arch down together below the dorsal over the lower three tepals. The anthers are white, the stigma branches narrow, positioned over the anthers. All of them are effectively exserted; the flower in picture probably still young.

The lower lateral tepals are an identical or highly similar pair, the smallest members of the corolla. The two of them are more or less lying on top of the central, lowermost tepal. Yellow colouring in picture is confined to the basal part of this bottom tepal (Goldblatt and Manning, 1998; Le Roux, et al, 2005; Eliovson, 1990; iNaturalist; www.pacificbulbsociety.org).