Is Mexican Sage Edible?

Do you know if mexican sage is an edible plant?

Mexican bush sage (Salvia leucantha) is not used for culinary purposes as far as I know. All sources that I have consulted say nothing about any traditional or contemporary use in food. The somewhat aromatic leaves have little taste.
The main uses of Mexican bush sage are as a landscaping plant and as a cutflower for dried or fresh flower arrangements.