Maybe the correct one is
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a tree up to 15 m tall, with little thick branches, leaves and ovate fruit, and white flowers (ziziphus rhodoxylon)
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a tree up to 15 m tall, with little thick branches, ovate leaves and fruit, and white flowers (ziziphus rhodoxylon)
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a tree up to 20 m high, with erect trunk, fingered leaves and violet, pink or white flowers (tabebuia pentaphylla)
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a shrub up to 2 m in height, with sharp branches, leaves with toothed edge, and white flowers(proustia cuneifolia)