马松子（学名：Melochia corchorifolia）为禾本科马松子属下的一个种。

Melochia corchorifolia, chocolateweed, is a weedy tropical plant that is typically seen in the wastelands. It has been most frequently observed to grow in open areas, such as highways. Although Melochia corchorifolia does not have any common usage, it has been utilized as a homeopathic remedy. Its weedy and invasive characteristic inhibits its wider cultivation.