| Convolvulaceae | * |
Hewittia bicolor
| Wight & Arn. | Madras J. Lit. Sci. 1(5): 22 | 1837 |
| Convolvulaceae | |
Hewittia malabarica
| (L.) Suresh | An Interpretation of Van Rheede's Hortus Malabaricus 88 | 1988 |
| Convolvulaceae | |
Hewittia puccioniana
| (Chiov.) Verdc. | Webbia 13: 322 | 1958 |
| Convolvulaceae | ! |
Hewittia scandens
| (Milne) Mabb. | Bot. Hist. Hort. Malab. 84 | 1980 |
| Convolvulaceae | ** |
Hewittia scandens
| (Milne) Mabb. | Taxon 29(5–6): 606 | 1980 |
| Convolvulaceae | |
Hewittia sublobata
| (L. f.) Kuntze | Revis. Gen. Pl. 2: 441 | 1891 |