| Watsonia aletroides (Burm. f.) Ker Gawl. | | a | | Watsonia aletroides(Burm. f.) Ker Gawl. | |
| Watsonia angusta Ker Gawl. | | a | | Watsonia angustaKer Gawl. | |
| Watsonia ardernei Sander | Watsonia borbonica (Pourr.) Goldblatt subsp. ardernei (Sander) Goldblatt | | | Watsonia arderneiSander | Watsonia borbonica(Pourr.) Goldblatt subsp. ardernei (Sander) Goldblatt |
| Watsonia beatricis J. W. Mathews & L. Bolus | Watsonia pillansii L. Bolus | | | Watsonia beatricisJ. W. Mathews & L. Bolus | Watsonia pillansiiL. Bolus |
| Watsonia bulbillifera J. W. Mathews & L. Bolus | Watsonia meriana (L.) Mill. | | | Watsonia bulbilliferaJ. W. Mathews & L. Bolus | Watsonia meriana(L.) Mill. |
| Watsonia comptonii L. Bolus | Watsonia zeyheri L. Bolus | | | Watsonia comptoniiL. Bolus | Watsonia zeyheriL. Bolus |
| Watsonia densiflora Baker | | a | | Watsonia densifloraBaker | |
| Watsonia flavida L. Bolus | Watsonia watsonioides (Baker) Oberm. | | | Watsonia flavidaL. Bolus | Watsonia watsonioides(Baker) Oberm. |
| Watsonia galpinii L. Bolus | | a | | Watsonia galpiniiL. Bolus | |
| Watsonia humilis Mill. | | a | | Watsonia humilisMill. | |
| Watsonia iridifolia (Jacq.) Ker Gawl. | Watsonia spp. | | | Watsonia iridifolia(Jacq.) Ker Gawl. | Watsonia spp. |
| Watsonia iridifolia (Jacq.) Ker Gawl. var. obrienii N. E. Br. | Watsonia borbonica (Pourr.) Goldblatt subsp. ardernei (Sander) Goldblatt | | i | Watsonia iridifolia(Jacq.) Ker Gawl. var.obrienii N. E. Br. | Watsonia borbonica(Pourr.) Goldblatt subsp. ardernei (Sander) Goldblatt |
| Watsonia marginata (L. f.) Ker Gawl. | | a | | Watsonia marginata(L. f.) Ker Gawl. | |
| Watsonia meriana (L.) Mill. | | a | | Watsonia meriana(L.) Mill. | |
| Watsonia priorii L. Bolus | Watsonia pillansii L. Bolus | | | Watsonia prioriiL. Bolus | Watsonia pillansiiL. Bolus |
| Watsonia pyramidata (Andrews) Klatt | Watsonia borbonica (Pourr.) Goldblatt subsp. borbonica | | | Watsonia pyramidata(Andrews) Klatt | Watsonia borbonica(Pourr.) Goldblatt subsp. borbonica |
| Watsonia rosea Banks ex Ker Gawl. | Watsonia borbonica (Pourr.) Goldblatt subsp. borbonica | | | Watsonia roseaBanks ex Ker Gawl. | Watsonia borbonica(Pourr.) Goldblatt subsp. borbonica |
| Watsonia stanfordii L. Bolus | Watsonia fourcadei J. W. Mathews & L. Bolus | | | Watsonia stanfordiiL. Bolus | Watsonia fourcadeiJ. W. Mathews & L. Bolus |
| Watsonia strubeniae L. Bolus | | a | | Watsonia strubeniaeL. Bolus | |
| Watsonia tabularis J. W. Mathews & L. Bolus | | a | | Watsonia tabularisJ. W. Mathews & L. Bolus | |
| Watsonia versfeldii J. W. Mathews & L. Bolus | | a | | Watsonia versfeldiiJ. W. Mathews & L. Bolus | |
| Watsonia wilmaniae J. W. Mathews & L. Bolus | | a | | Watsonia wilmaniaeJ. W. Mathews & L. Bolus | |
| Watsonia wilmsii L. Bolus | | a | | Watsonia wilmsiiL. Bolus | |
| Watsonia wordsworthiana J. W. Mathews & L. Bolus | Watsonia spp. | | | Watsonia wordsworthianaJ. W. Mathews & L. Bolus | Watsonia spp. |
| Watsonia hybr. | | a | | Watsonia hybr. | |
| Watsonia natalensis Eckl. | Gladiolus dalenii Van Geel | | | Watsonia natalensisEckl. | Gladiolus daleniiVan Geel |
| Watsonia borbonica (Pourr.) Goldblatt | | a | | Watsonia borbonica(Pourr.) Goldblatt | |
| Watsonia borbonica (Pourr.) Goldblatt subsp. borbonica | | a | i | Watsonia borbonica(Pourr.) Goldblatt subsp. borbonica | |
| Watsonia borbonica (Pourr.) Goldblatt subsp. ardernei (Sander) Goldblatt | | a | i | Watsonia borbonica(Pourr.) Goldblatt subsp. ardernei (Sander) Goldblatt | |
| Watsonia pillansii L. Bolus | | a | | Watsonia pillansiiL. Bolus | |
| Watsonia zeyheri L. Bolus | | a | | Watsonia zeyheriL. Bolus | |
| Watsonia watsonioides (Baker) Oberm. | | a | | Watsonia watsonioides(Baker) Oberm. | |
| Watsonia spp. | | a | | Watsonia spp. | |
| Watsonia fourcadei J. W. Mathews & L. Bolus | | a | | Watsonia fourcadeiJ. W. Mathews & L. Bolus | |
| Watsonia meriana (L.) Mill. var. bulbillifera (J. W. Mathews & L. Bolus) D. A. Cooke | Watsonia meriana (L.) Mill. | | i | Watsonia meriana(L.) Mill. var.bulbillifera (J. W. Mathews & L. Bolus) D. A. Cooke | Watsonia meriana(L.) Mill. |
| Watsonia iridifolia (Jacq.) Ker Gawl. var. iridifolia | Watsonia spp. | | i | Watsonia iridifolia(Jacq.) Ker Gawl. var.iridifolia | Watsonia spp. |
| Watsonia meriana (L.) Mill. var. meriana | Watsonia meriana (L.) Mill. | | i | Watsonia meriana(L.) Mill. var.meriana | Watsonia meriana(L.) Mill. |