Not edible.
Medicine melon, also known as medicine watermelon, is a vine poisonous plant, is not edible, but all its parts are poisonous and can be used as an insecticide.
The exterior is hairless and plush, with a vertical texture and a male and female melon tip. Empty core with spongy substance inside, and seeds similar to pumpkin seeds. Specifically, on the one hand, the flesh of this type of watermelon is white when cut, and it will have a hollow core, and its appearance is like the grafting product of cantaloupe and watermelon, and its light green texture is not like the ordinary one which is wavy, but is crumbly and has no texture.
Extended information
Medicinal watermelon is distributed in North Africa and the southeastern coast of the Mediterranean Sea, the Arabian Peninsula, eastward through Iran, Afghanistan, India, until Australia. In the former Soviet Union, Kalyan Gedenyev (1950) found wild medicinal watermelons in the Dzhan Valley of Turkmenistan.
In addition, in the medicine watermelon seedling stage there are crickets for slight biting, and found very few standing blight, can be replenished, such as aphids found on individual leaves, but did not spread, mainly because of the medicine watermelon plants are densely covered with bristles. There are traces of mice eating during the fruiting period. Overall the pests and diseases are slight and do not affect the yield and quality.
Baidu Encyclopedia - Medicine Watermelon