SUBALPINE

alpestrine, subalpine

(adjective) growing at high altitudes

Source: WordNet® 3.1

Etymology

Adjective

subalpine (comparative more subalpine, superlative most subalpine)

At the foot of the Alps

At or just below the tree-line

Source: Wiktionary

Sub*al"pine, a. Etym: [L. subalpinus.] (Bot. & Zoöl.)

Definition: Inhabiting the somewhat high slopes and summits of mountains, but considerably below the snow line.

Source: Webster’s Unabridged Dictionary 1913 Edition