String of Watermelons Senecio herreanus is a succulent plant of the genus Senecio in the family Asteraceae. It's called String of Watermelons because its striped shape is somewhat similar to a watermelon.

The stems of String of Watermelons grow prostrate, the leaves are fleshy and teardrop-shaped, green, with a stripe on the epidermis, and the stripes will turn purple when there is a large temperature difference and sufficient light, and even the whole leaf will look a little purple-red. In addition, String of Watermelons has a thicker and somewhat transparent stripe on the leaf surface.