alpestrine
/alˈpɛstrʌɪn/Chiefly Botany. Now rare
adjective
Originally: of or characteristic of mountains, especially the Alps. In later use: (specifically) designating a zone of vegetation growing below the tree line in a mountainous habitat; of or characteristic of this zone.
Origin
Late 18th century; earliest use found in John Abercrombie (1726–1806), horticulturist and writer. From post-classical Latin alpestris mountainous + -ine.