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Gladiolus antholyzoides Baker is distributed across the central and eastern high veld of South Africa. Flowers are yellow, sometimes streaked with red or orange and with an orange ring around the throat. This species was once included in Antholyza as Antholyza laxiflora and Antholyza schlechteri, presumably because of its long perianth tube. It has also had other Gladiolus species names.
Gladiolus edulis Burch. ex Ker Gawler see Gladiolus permeabilis
Gladiolus imbricatus is native to southeastern Europe and Turkey. It grows in wet meadows and marshes and flowers from May to July. It has a dense spike of 4 to 12 pale carmine to deep purple flowers, streaked purple and white. Its lowest leaf is round or blunt, not sharp which is another distinguishing characteristic.
Gladiolus magnificus (Harms) Goldblatt is a southern tropical African species found from central Angola through southern Zambia to western Zimbabwe. It is also found in the northern edges of Namibia and Botswana. In the past this species has been included in Antholyza under three species names as well as being included in Chasmanthe and Oenostachys. It has bright red flowers with a long perianth tube and reduced lower tepals with yellow markings. Tepals are very unequal with the dorsal the largest, hooded and horizontal. The laterals are broadly lanceolate and directed forward. It flowers in January and February. Photo from iNaturalist taken by Cody Coyotee Howard in Namibia and shared under a CC BY-NC license.
Gladiolus salteri G.J.Lewis is a winter-grower found in a small area of granite hills in Namaqualand. It has thin pink tepals, with red and cream chevrons on the lower ones, and is believed to be pollinated by long-tongued bees. You can see a photo of it here.