Belongs within: Brassicaceae.
Brassica is a genus of herbs native to Eurasia though some species have been introduced more or less worldwide through their cultivation for food (Hickman 1993).
Characters (from Hickman 1993): Annual, perennial; hairs simple. Stem erect, branched, glabrous above. Basal and lower cauline leaves petioled, dentate to pinnately lobed, lateral lobes shorter than terminal. Inflorescence terminal; bracts more or less absent. Flower with sepals erect; petals generally yellow. Fruit linear; valves 1-veined; beak conic or cylindric, with seeds absent or rarely 1–2. Seeds many, 1 row per chamber, spheric, finely to coarsely netted.
<==Brassica
|--B. adpressa C06
|--B. balearica C55
|--B. carinata GM96
|--B. chinensis H90 [=B. napus var. chinensis PT01]
| |--B. c. var. chinensis P88
| `--B. c. var. parachinensis P88
|--B. cretica PT98
| |--B. c. ssp. cretica PT98
| `--B. c. ssp. aegaea PT98
|--B. fimbriata H90
|--B. fruticulosa H90
|--B. hilarionis D30
|--B. insularis C55
|--B. juncea M99
|--B. napus M99 [incl. B. campestris var. oleifera C06, B. napus var. oleifera TG88]
|--B. nigra M99
|--B. oleracea Linnaeus 1753 CD07
| |--B. o. var. olereacea M99
| |--B. o. var. acephala LS96
| |--B. o. var. botrytis M99
| |--B. o. var. capitata M99
| |--B. o. var. gemmifera H90
| `--B. o. var. italica M99
|--B. pekinensis BMM99
|--B. rapa H93 [=B. campestris var. rapa C06; incl. B. campestris H93]
| |--B. r. var. rapa H90
| `--B. r. var. sylvestris H90
|--B. rutabaga CS77
|--B. sinapistrum C06
`--B. tournefortii KM08
*Type species of generic name indicated
REFERENCES
[BMM99] Braun, U., J. Mouchacca & E. H. C. McKenzie. 1999. Cercosporoid hyphomycetes from New Caledonia and some other South Pacific islands. New Zealand Journal of Botany 37: 297–327.
[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.
[C06] Cheeseman, T. F. 1906. Manual of the New Zealand Flora. John Mackay, Government Printer: Wellington.
[CS77] Cramp, S., & K. E. L. Simmons (eds) 1977. Handbook of the Birds of Europe, the Middle East and North Africa: The Birds of the Western Palaearctic vol. 1. Ostrich to Ducks. Oxford University Press: Oxford.
[D30] Druce, G. C. 1930. Account of a botanical tour in Cyprus. Proceedings of the Linnean Society of London 141: 50–52.
[GM96] Griffiths, A. J. F., J. H. Miller, D. T. Suzuki, R. C. Lewontin & W. M. Gelbart. 1996. An Introduction to Genetic Analysis 6th ed. W. H. Freeman and Company: New York.
[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).
[KM08] Keighery, G. J., & W. Muir. 2008. Vegetation and vascular flora of Faure Island, Shark Bay, Western Australia. Records of the Western Australian Museum Supplement 75: 11–19.
[LS96] Liu, T.-X., & P. A. Stansly. 1996. Morphology of Nephaspis oculatus and Delphastus pusillus (Coleoptera: Coccinellidae), predators of Bemisia argentifolii (Homoptera: Aleyrodidae). Proceedings of the Entomological Society of Washington 98 (2): 292–300.
[M99] Matthews, M. 1999. Heliothine Moths of Australia: A guide to bollworms and related noctuid groups. CSIRO Publishing.
[PT98] Panitsa, M., & D. Tzanoudakis. 1998. Contribution to the study of the Greek flora: flora and vegetation of the E Aegean islands Agathonisi and Pharmakonisi. Willdenowia 28: 95–116.
[PT01] Pemberton, L. M. S., S.-L. Tsai, P. H. Lovell & P. J. Harris. 2001. Epidermal patterning in seedling roots of eudicotyledons. Annals of Botany 87: 649–654.
[P88] Polunin, I. 1988. Plants and Flowers of Malaysia. Times Editions: Singapore.
[TG88] Tepfer, D., A. Goldmann, N. Pamboukdjian, M. Maille, A. Lepingle, D. Chevalier, J. Dénarié & C. Rosenberg. 1988. A plasmid of Rhizobium meliloti 41 encodes catabolism of two compounds from root exudate of Calystegium sepium. Journal of Bacteriology 170 (3): 1153–1161.
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