While I was visiting with a sister-in-law in Louisiana, I noticed a spindly vine with leaves that looked very familiar to the cucamelon.    Sure enough, it was the Melethria pendula or Creeping Cucumber. I had never seen one of these cucumber varieties before, but it definitely did look a lot like a regular cucamelon. As I didn’t want to waste the seed from the fruit, I didn’t pick it immature –