smoke it
If by Salvia you mean Salvia Divinorum, then the answer is no. Salvia Divinorum is not used in Chinese medicine, as Salvia does not naturally grow in any region of China. Salvia Divinorum is only to be found in Oaxaca, Mexico.
No, Salvia nemorosa does not contain salvinorins, the active components of Salvia divinorum.
Although some studies have indicated that Salvia divinorum may be effective in treating the symptoms of depression, taking Salvia divinorum (particularly smoking it) should be considered unhealthy, especially because the long term effects of Salvia divinorum usage are not well-known.
Mexico
No.
Salvia divinorum does flower, but it is very difficult to start a plant from seed. Usually, plants are cloned from cuttings.
No it is not possible to test for salvia.
Depends on what kind of salvia you're talking about. Only Salvia Divinorum species can get you high. Don't get fooled, there are a lot of varieties of Salvia.
Salvia divinorum is the only species in the genus Salvia which contains salvinorins, the active compounds that produce a hallucinogenic effect. The leaves of S. divinorum could be used to trip, although one would need to use a much larger quantity than for the extract. The extract is simply the isolated and concentrated salvinorins (along with other compounds). Because the extract is more potent, it is generally much easier to get an effect from the extract, although it is certainly possible with simply the leaves (for example, a large quantity of leaves chewed as a quid).
Yes, Salvia divinorum is legal plant in the Lebanon.
Salvia divinorum is the only species in the genus Salvia that contains Salvinorins. Thus, smoking other species of Salvia, including the ornamental Mystic Blue, would not have the same effect.
Salvia Divinorum grows only in Oaxaca, Mexico.