Herb Tea Salvia

I need your help. I need to find out if I can use the "Sage" out of my garden for tea. I have different varieties in my garden, but my mother said, I should use "folia salvia E". This is the name in Latin for "Sage" and the Sage I am suppose to use. Only thing is, that I do not know if it is the same as I have in my garden. If not where could I get it?
PS: we bought our "Sage" in local garden centers a few years back.

It is hard to say if you have the right salvia. There are hundreds of different salvias, many of which are grown in gardens. And there are several different species used in herbal medicine, some of which are not commonly grown in gardens.
"Folia Salvia E" is not the latin name for the plant. "Folia" means leaves and "Salvia" is the genus part of the latin name, but there are hundreds of plants that belong to the Salvia genus and thus have "Salvia" as the first part of their latin names. I have no idea what the "E" refers to.
It is possible that your recipe is calling for Salvia officinalis, the common culinary sage which also has medicinal properties. But there is no way of telling that from what information you have supplied.