Cones with cone brachts shorter than cone scales and not visible; found in northeastern North America and the boreal regions of Canada and Alaska.

Tamarack (Larix laricina)

Cones with cone brachts longer than cone scales and giving the cone a bristly appearance; found in the montane regions of the Pacific Northwest.

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Cones 2 inches long; needles rectangular-elongate in cross-section; found near timberline.

Subalpine Larch (Larix lyallii)

Cones 1 to 1.5 inches long; needles triangular-elongate in cross-section; found on wet montaine slopes well below timberline.

Western Larch (Larix occidentalis)