Belongs within: Cucurbitales.
The Cucurbiteae are a group of annual herbs or woody lianas that often produce large, showy flowers; several species are widely grown for their edible fruit.
<==Cucurbiteae [Cucurbitoideae]
`--CucumerinaeBR65
|--Ecballium elaterium [=Momordica elaterium]BR65
|--MomordicaBR65
| |--M. balsaminaBR65
| |--M. charantiaSR07
| | |--M. c. var. charantiaSR07
| | `--M. c. var. muricataSR07
| |--M. dioicaP03
| `--M. senegalensisC55
|--Citrullus Forskål 1775 (nom. cons. prop.) [incl. Anguria Miller 1754, Colocynthis Ludw. 1757]BR65
| |--C. colocynthisBR65
| |--C. lanatus (Thunb.) Matsumura & Nakai 1920SY72 (see below for synonymy)
| | |--C. l. var. lanatusM99
| | `--C. l. var. cafferM99
| `--C. rehmiiCV06
`--CucumisWM09
|--C. anguriaH90
|--C. callosusPP07
|--C. chate [incl. C. jucundus, C. picrocarpus, C. trigonus (preoc.)]BR65
|--C. citrullus [=Cucurbita citrullus]C55
|--C. meloM99
| | i. s.: C. m. var. cantalupensisM99
| | C. m. var. dudaimH93
| | C. m. var. momordicaPP07
| | C. m. var. reticulatusBR65
| | C. m. var. saccharinusBR65
| |--C. m. ssp. meloH90
| `--C. m. ssp. agrestisH90
|--C. metuliferaH90
|--C. myriocarpusBR65
|--C. prophetarumPP07
|--C. sativaWM09
`--C. zeyheriH90
Cucurbiteae incertae sedis:
CucurbitaCD07
|--C. aurantiaC55
|--C. digitataBT72
|--C. ficifoliaRS99
|--C. foetidissimaH93
|--C. maximaC55
|--C. melopepoC55
|--C. mixtaKSM06
|--C. moschataM99
|--C. oviferaC55
|--C. palmataH93
|--C. pepo Linnaeus 1753CD07
|--C. texanaTPH-B01
`--C. verrucosaC55
Citrullus lanatus (Thunb.) Matsumura & Nakai 1920SY72 [=Momordica lanata Thunb. 1807SY72, C. colocynthis var. lanatusH93; incl. C. vulgaris Schrader ex Eckl. & Zeyh. 1836SY72, C. lanatus var. vulgarisK10]
*Type species of generic name indicated
References
[BT72] Baker, E. W., & D. M. Tuttle. 1972. New species and further notes on the Tetranychoidea mostly from the southwestern United States (Acarina: Tetranychidae and Tenuipalpidae). Smithsonian Contributions to Zoology 116: 1–37.
[BR65] Black, J. M., & E. L. Robertson. 1965. Flora of South Australia. Part IV. Oleaceae–Compositae. W. L. Hawes, Government Printer: Adelaide.
[C55] Candolle, A. de. 1855. Géographie Botanique Raisonée: Ou exposition des faits principaux et des lois concernant la distribution géographique des plantes de l’époque actuelle vol. 2. Librairie de Victor Masson: Paris.
[CD07] Cantino, P. D., J. A. Doyle, S. W. Graham, W. S. Judd, R. G. Olmstead, D. E. Soltis, P. S. Soltis & M. J. Donoghue. 2007. Towards a phylogenetic nomenclature of Tracheophyta. Taxon 56 (3): E1–E44.
[CV06] Craven, P., & P. Vorster. 2006. Patterns of plant diversity and endemism in Namibia. Bothalia 36 (2): 175–189.
[H90] Harden, G. J. (ed.) 1990. Flora of New South Wales vol. 1. New South Wales University Press.
[H93] Hickman, J. C. (ed.) 1993. The Jepson Manual: Higher Plants of California. University of California Press: Berkeley (California).
[K10] Keighery, G. 2010. The naturalised vascular plants of the Pilbara region, Western Australia. Records of the Western Australian Museum Supplement 78 (1): 299–311.
[KSM06] King, R. C., W. D. Stansfield & P. K. Mulligan. 2006. A Dictionary of Genetics 7th ed. Oxford University Press.
[M99] Matthews, M. 1999. Heliothine Moths of Australia: A guide to bollworms and related noctuid groups. CSIRO Publishing.
[PP07] Pandey, R. P., & P. M. Padhye. 2007. Studies on phytodiversity of Arid Machia Safari Park-Kailana in Jodhpur (Rajasthan). Bulletin of the Botanical Survey of India 49: 15–78.
[P03] Paul, T. K. 2003. Botanical observations on the Purulia pumped storage hydropower project area, Bagmundi Hills, Purulia district, West Bengal. Bulletin of the Botanical Survey of India 45: 121–142.
[RS99] Rossman, A. Y., G. J. Samuels, C. T. Rogerson & R. Lowen. 1999. Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes). Studies in Mycology 42: 1–248.
[SR07] Sankar, R. V., K. Ravikumar, N. M. Ganesh Babu & D. K. Ved. 2007. Botany of Anapady MPCA, Palghat district, Kerala with special emphasis on species of conservation concern. Bulletin of the Botanical Survey of India 49: 165–172.
[SY72] Shah, G. L., & D. V. Yogi. 1972. Nomenclatural changes in some Bombay plants—IV. Journal of the Bombay Natural History Society 69 (2): 444–449.
[TPH-B01] Touraev, A., M. Pfosser & E. Heberle-Bors. 2001. The microspore: a haploid multipurpose cell. Advances in Botanical Research 35: 53–109.
[WM09] Wang, H., M. J. Moore, P. S. Soltis, C. D. Bell, S. F. Brockington, R. Alexandre, C. C. Davis, M. Latvis, S. R. Manchester & D. E. Soltis. 2009. Rosid radiation and the rapid rise of angiosperm-dominated forests. Proceedings of the National Academy of Sciences of the USA 106 (10): 3853–3858.