The genus Jatropha, a member of Euphorbiaceae family, comprises ≈176 known species (Kumar and Sharma, 2008). This genus distributes widely in tropical, subtropical, and semiarid zones in the forms of woody trees, rhizomatous plants, geophytes, shrubs, and sub-shrubs (Dehgan, 1984). Two better known species, Jatropha curcas L. and Jatropha integerrima Jacq., are cultivated for different uses. J. curcas (jatropha, physic nut) is an oil-bearing tree native to Central America and later introduced to Africa and Asia. It is presently grown in many countries in tropical and subtropical regions, mainly as a natural fence or for seed oil used in biodiesel production. J. integerrima (peregrina) is native to India and grown for commercial ornamental potted plant and outdoor gardening (Lakshminarayana and Sujatha, 2001). Its flowers are of raceme type with deep red to pink florets setting year-round, whereas fruiting is rare giving small seeds. Interspecific hybridization among both species showed a potential for ornamental purpose in India (Sujatha and Prabakaran, 2003).
‘Kamphaeng Saen 1’, ‘Kamphaeng Saen 2’, and ‘Kamphaeng Saen 3’ are new ornamental jatropha cultivars improved by the Jatropha breeder team of Kasetsart University, Kamphaeng Saen campus, Thailand, for potted plants and gardening. The varieties flower year-round with unique flower colors. They are easily propagated by cutting or grafting. The cultivars were released in 2013 for ornamental growers to produce commercial potted plants in Thailand.
Kumar, A. & Sharma, S. 2008 An evaluation of multipurpose oil seed crop for industrial uses (Jatropha curcas L.): A review Ind. Crops Prod. 28 1 10
Lakshminarayana, M. & Sujatha, M. 2001 Screening of Jatropha species against the major defoliators of castor (Ricinus communis L.) J. Oilseeds Res. 18 228 230
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Sujatha, M. & Prabakaran, A.J. 2003 New ornamental Jatropha hybrids through inter-specific hybridization Genet. Resources Crop Evol. 50 75 80