The papaya (sometimes called papaw) and the passionflowers are closely related, and the fruit-bearing kinds are treated together in this chapter. Some botanists place them all in one family even though the papaya is an erect plant and the passion-flowers are tendril-bearing vines; but recent botanists separate them into the Caricaceae (or Papayaceae) and Passifloraceae. In botanical structure, the fruits are very similar, and they are related not distantly to the Cucurbitaceae (pumpkins and melons).