from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. (of conifers) having five needles
Sorry, no etymologies found.
However, there have been a number of whitebark pine trees found to be resistant to the nonnative pathogen white pine blister rust, which has been a major threat to whitebark and other five-needled pines since the early 20th century.
Experience has indicated that many of the oldest five-needled pines have experienced cambial dieback to varying degrees.
These mycorrhizal fungi are specific to five-needled pines, including whitebark and limber pines.
Whitebark pine (Pinus albicaulis) is a five-needled conifer species whose coastal distribution extends from the Bulkley Mountains in British Columbia to the northeastern Olympic Mountains and Cascade Range in Washington and Oregon to the Kern River of the Sierra Nevada Range of east-central California.