Like other deciduous larches, the subalpine larch, Larix lyallii, sheds its needles each year. The trees make a grand show up there near the treeline, with their yellow needles and often twisted form. Further down the mountains, they tend to be taller and grow straighter. Fresh new twigs have single needles, whereas older twigs have clusters of needles growing from a little raised knot along the twig. Cones are spherical with long bracts extending out past each scale, giving the cones a shaggy appearance. These trees grow along with their very close and very similar relative, Larix occidentalis, in the upper Rocky Mountains and Cascade range in the northwestern United States and nearby regions of Canada.