BP Singh

106 Deep ChandGood, Ronald (1953). The Geography of Flowering Plants. 2nd edn.,Longmans, Green & Co, London.Hocking, G.M. (1947). Economic Botany 1 : 306-316.Pursegove, J.W. (1977). Tropical Crops. Vol. I & II. Longmans GroupLimited, London.Sinclair, J. (1958). Gardeners Bull. Singapore, 16 : 205-466.Singh, B.M., Pareek, S.K., MandaI 5., Maheshwari, M.L. and Gupta,R. (1992). Variability in periwinkle (Catharanthus roseus).Indian Journal of Agricultural Sciences 62 : 47-50.Uphof, J.e. Th (1968). Dictionanj oj Economic Plants. 2nd ed StechertHafner Service Agency Inc., New York.Zeven, A.e. and Zhukovskyn, P. (1975). Dictionary of CultivatedPlants and their centres of diversity for Agriculture, Wageningen,pp.219.Table 1. Centres of diversity of the common medicinal andaromatic plants (Mega centres of cultivated plants ofZhukovsky, 1970)Centre of originPlan t species1. Chinese-Japan centre Panax ginseng, P. quinquifolius, Ginkgobi/oba, Plantago major~."'"U2. Indo-China Indonesian Cyrnhopogon citratus, C. nardus, Vetiveriacentrezizanioides (syn = V. odorata) -r:Gliilsaromaticus, Ocimum basilicum O.gratissimum, Pogosternon cablin3. Australian centre Duboisia leichhardtii, D. myoporides,Solanum laciniatum4. Hindustani centre Rauvolfia serpentina, Cymbopogon martinii,Vet£veria zizanoides, Jasminumgrandiflorum, J. samback, Plantago ovata,Atropa balladonna, Datura metal5. Central Asian centre Jasminum officinale, Papaver somniferum6. Near Eastern centre Pimpinella anisum, Papaver somniferum.