Alpestrine \Al*pes"trine\, a. (Bot.) Growing on the elevated parts of mountains, but not above the timbe? line; subalpine.
Source: Webster's Revised Unabridged Dictionary (1913)
Alpestrine \Al*pes"trine\, a. [L. Alpestris.] Pertaining to the Alps, or other high mountains; as, Alpestrine diseases, etc.