The watermelon, Citrullus lanatus (Thunb.) Matsumura & Nakai (synonym Citrullus vulgaris Schrader), belongs to the Cucurbitaceae family. It is a monoecious trailing herb with softly pubescent leaves, 11—15 x8—10 cm in size, deeply trifid, with segments further bipinnatifid, obovate-oblong/obtuse-round lobes, and robust, bifid tendrils. The flowers are 2 cm across with a five-lobed calyx, hypantheous, adnate to the ovary; the corolla is yellow and five-lobed; there are basically five stamens but they are partially synandrous; the ovary is inferior and ovoid in shape. The fruit is dark green or white striped, and measures 30—45 cm by 45 cm (Matthew, 1991).
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