. Bulletin. Natural history; Natural history -- Montana. 22D BULLETIN UNIVERSITY OF MONTANA found at rather high altitudes, although it was not seen to overlap in its distribution the white-bark pine of the higher altitudes. It is said to reach its best development in the bottom-lands of streams tributary to Lake Pend d'Oreille. The white-bark pine (Pinus albicaulis Engelm.): It is distinctly an alpine form. (Fig. 9.) The leaves are in clusters of five, and from one. Fig. 9. White-bark pine on the slope of Sinvaieamin Mountain, at altitude of 7800 feet, showing the struggle thej make for an ex
. Bulletin. Natural history; Natural history -- Montana. 22D BULLETIN UNIVERSITY OF MONTANA found at rather high altitudes, although it was not seen to overlap in its distribution the white-bark pine of the higher altitudes. It is said to reach its best development in the bottom-lands of streams tributary to Lake Pend d'Oreille. The white-bark pine (Pinus albicaulis Engelm.): It is distinctly an alpine form. (Fig. 9.) The leaves are in clusters of five, and from one. Fig. 9. White-bark pine on the slope of Sinvaieamin Mountain, at altitude of 7800 feet, showing the struggle thej make for an existence. Photo b\ Prof. L. A. Youtz. and a half to two and a half inches in length. They are said to persist for from five to eight years, most of them remaining on the trees from seven to eight years. The bark is very thin. It is quite smooth and is creamy white in appearance, hence the name white-bark pine. It is easily destroyed by fire. The white-bark pine grows on the most ex- posed ridges in high altitudes. It is confined to the western continental â divide, where it is usually associated with the alpine Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Montana (Missoula); University of Montana (Missoula). Biological series. Missoula : University of Montana
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