Pterygodium alatum maybe

This creamy white and green flowering orchid photographed on a slope in the Biedouw Valley during September may be Pterygodium alatum.

Doubt is caused by the lip-shape while the wing-like, spreading petals are rounded to nearly triangular in the normal way, the unevenly crenated outer margins as expected.

The lip below has widely diverging lobes, as they do in P. alatum, but they are narrower than normal, the midlobe part too elaborate. The lip appendage, erect in the centre, does not appear tall enough, the hood-like part at its top obscure.

P. alatum is mostly found in the Western Cape, coastally into the Eastern Cape as far as Port Elizabeth and into the Northern Cape around Nieuwoudtville.

The habitat is sandy flats and slopes among fynbos and renosterveld. The species is not considered to be threatened in its habitat early in the twenty first century (Liltved and Johnson, 2012; Vlok and Schutte-Vlok, 2015; Manning, 2007; iNaturalist; http://redlist.sanbi.org).