. A biological survey of Colorado. Natural history Colorado; Mammals Colorado; Trees Colorado. 1011.] TREES AND RlfKUBS. 215 best pine forests of southwestern Colorado, l)ut llici-e still remain lart^e areas, and fortunately these are now lar<i;(dy included in llie San Juan and iMontezunia Xatioinil Forests. Pinus murrayana. Lod^^epok^ Pine. A broad Ix^lt of magnifieent lodgepole pine forest with a vertical bn^adtli av(M'a<2;ing 2,000 feet occupies the middle slojx's of the lii^h mountain ran^-cs of northern Colorado between 8,000 and 10,000 feet. (See ii<2;. .')().) This forest cloth
. A biological survey of Colorado. Natural history Colorado; Mammals Colorado; Trees Colorado. 1011.] TREES AND RlfKUBS. 215 best pine forests of southwestern Colorado, l)ut llici-e still remain lart^e areas, and fortunately these are now lar<i;(dy included in llie San Juan and iMontezunia Xatioinil Forests. Pinus murrayana. Lod^^epok^ Pine. A broad Ix^lt of magnifieent lodgepole pine forest with a vertical bn^adtli av(M'a<2;ing 2,000 feet occupies the middle slojx's of the lii^h mountain ran^-cs of northern Colorado between 8,000 and 10,000 feet. (See ii<2;. .')().) This forest clothes the summits of the Laramie Divide and of the lower parts of the Medicine Bow, Park, and Gore Rant^es. Farther south this pine covers an extensive area on the Saguache Range and on tiie mountains of the Gunnison country. The southern Ihnit is n^ached on the Continental Divide at the head of the Saguache River. On the wSangre de Cristo Range a narrow belt extends south along the eastern slope as far as Cres- tone Peak, but the species appears to be entirely absent from the western slope of the same range. A few of these pines are found on the summit of Veta Pass—th- southernmost point at which the species is known to occur within the State. The heaviest and purest forests of lodgepole pines were traversed on the high divide east of Lara- mie River and on the Park and Gore Ranges, at an elevation of about 9,500 feet. (See fig. 3L) On most of the ranges, however, the pines are mixed with aspens below 9,500 feet and with Engelmann spruces above 10,000 feet. To the west P. murrayana is the common forest tree in the Elk Head Mountains and in the region bordering Egeria Park, but on the ^^^lite River Plateau it does not extend far west of the South Fork of A^Tiite River. A scattering growth is reported on Diamond Peak and Mount Cullom, on opposite sides of Green River in extreme northv7estern Routt County. The lowest elevation reached within the State appears to be on the northern
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