NOVELTY - An interspecific hybrid of Jatropha curcas plant designated as Nandan-4 with functional gynoecium produced by crossing Jatropha gossypifolia as female parent with Jatropha curcas as pollen parent, is new.    USE - The interspecific hybrid of Jatropha curcas plant is useful for producing a biofuel, where the biofuel is biodiesel (all claimed).    ADVANTAGE - In producing interspecific hybrid of Jatropha plant, the Nandan-4 exhibits a high yield, resistance to disease and insect pests, improved canopy structure, tolerance to environmental stresses, improved agronomic characteristics and/or higher seed yield (claimed).    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are: (1) an interspecific Jatropha curcas hybrid (Nandan-4) plant or its part produced by asexual propagation or tissue culture procedure or growing the seed; (2) pollen of the hybrid (Nandan-4) plant; (3) an ovule of the hybrid (Nandan-4) plant; (4) a Jatropha curcas hybrid (Nandan-4) plant or its part that is having all of the physiological and morphological characteristics of the interspecific Jatropha plant; (5) a protoplast produced from the hybrid (Nandan-4) plant; (6) tissue culture cells produced from the interspecific Jatropha curcas hybrid (Nandan-4) plant, where the cells of the tissue culture are produced from a plant part selected from leaves, pollen, embryos, cotyledons, hypocotyls, meristematic cells, roots, root tips, pistils, anthers, flowers, inflorescence, and stems; (7) an inter specific Jatropha curcas hybrid (Nandan-4) plant regenerated from the tissue culture, where the plant has all the morphological and physiological characteristics of interspecific hybrid Nandan-4; (8) a process of producing the Jatropha interspecific hybrid Nandan-4; (9) a process of producing an interspecific hybrid of Jatropha plant with the morphological and physiological characteristics of hybrid Nandan-4 comprising regeneration of a tissue culture; (10) an inter specific hybrid Nandan-4 plant or its part prepared by the method; (11) a process of producing pollen from an inter specific hybrid of Jatropha plant designated as Nandan-4 comprising forming the plant by the method and extracting pollen; (12) a process of producing an ovule from an inter specific hybrid of Jatropha plant designated as Nandan-4 comprising forming the plant by the method and extracting an ovule; (13) a process of producing a protoplast from an inter specific hybrid of Jatropha plant designated as Nandan-4 comprising forming the plant by the method and extracting a protoplast; (14) a process of producing a microbiological product from an inter specific hybrid of Jatropha plant designated as Nandan-4 comprising forming the plant by the method and extracting a microbiological product; or comprising forming the plant by the method and extracting a microbiological product selected from either a pollen cell or an ovule cell; or comprising forming the plant by the method and extracting a microbiological product comprising one or more of embryos, protoplasts, meristematic cells, callus, leaves, anthers, pistils, root tips, seeds or stems; (15) a process of culturing tissue cells from an inter specific hybrid of Jatropha plant comprising culturing tissue cells produced from the Jatropha plant, where cells are selected from leaves, pollen, embryos, cotyledons, hypocotyls, meristematic cells, roots, root tips, pistils, anthers, flowers, inflorescence, callus, seeds and stems; and (16) a biofuel generated by the use of interspecific hybrid Nandan-4 plant or its part in a process for the production of a biofuel.