The Ornithoglossum undulatum petal tips are red purple here, fairly close in colour to their unripe, purple anthers in view. Only one of the six anthers has turned brown yet. The anthers are narrowly oblong, their two lobes separated by a white line in picture.
The three thin, white styles are longer than the stamens with little to show for stigmas at their tips.
A few stalked buds are visible near the flower in picture. The inflorescence is a few-flowered raceme.
This plant grows in the open on hard, stony ground in the Little Karoo (Vlok and Schutte-Vlok, 2015; Shearing and Van Heerden, 2008; Leistner, (Ed.), 2000; Bond and Goldblatt, 1984; iNaturalist).