There are so many wonderful colloquial names for plants, especially medicinal ones and ones with other specific uses. Some have dozens of names. For example, plants have often been named after Saints because they have healing properties. If you've heard the name used somewhere it is quite possible that it is a local term, so you need to ask someone from the area where you think you heard it. If you are looking to obtain such a plant, perhaps to honor a person of that name, you might also try Wikipedia - they mention a number of colloquial plant names that you won't find in formal classifications. Good luck!
