Northwest Conifers

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Subalpine Fir – Abies lasiocarpa

Needles: The needles curve upward in a uniform manner. They have white lines on both sides, two on the lower surface and one on top. The top of the tree forms a distinctive spire with short branches.

Twig

Needles

Needles - upper and lower surface

Cones: The purple cones sit upright on the branch and fall apart at maturity, leaving a cone core spike on the branch. The  cones often ooze a white resin.

Where it grows: Subalpine Fir grows in the Cascades and Olympics, often at or near the timberline in open areas and on windy ridges where it is small and sometimes contorted. It also grows throughout the Rocky Mountains and northward to Alaska. Although Subalpine Fir is shade-tolerant, it does not compete well with other conifers growing in the shade.

Map

USGS Distribution Map

Similar tree: Pacific Silver Fir often grows near the timberline and has a similar spire-like appearance, but has white lines only on the lower side of the needles.

Uses: While it has few commercial uses, Subalpine Fir is an important component of the subalpine forest community, providing habitat for animals and protecting watersheds that provide our drinking water.

Names: Lasiocarpa means "hairy fruit," a reference to the fibers that protrude from the cone scales (not shown in photo). Other common names: alpine fir, white fir, balsam fir, and Rocky Mountain fir.

Tree


© 2011 Ken Denniston