. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Rocky Mountain Nut Pine 17 and four-angled, gradually narrowed into a knob which is flat or sunken at the apex and without either spine or bristle. Like the other nut pines the middle scales only bear seeds; these are oblong, 15 mm. long, rather sharp-pointed, fuU and rounded at the base, yellowish on the sKghtly flattened upper side, dark red- dish brown on the rounded lower side; endosperm resinous and oily; wing narrow
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Rocky Mountain Nut Pine 17 and four-angled, gradually narrowed into a knob which is flat or sunken at the apex and without either spine or bristle. Like the other nut pines the middle scales only bear seeds; these are oblong, 15 mm. long, rather sharp-pointed, fuU and rounded at the base, yellowish on the sKghtly flattened upper side, dark red- dish brown on the rounded lower side; endosperm resinous and oily; wing narrow, adhering to the cone-scales when the seed falls; cotyledons 7 to 10. The wood is soft, brittle and weak, close-grained, yellow to light brown; its specific gravity is about It is largely used for fuel and to supply charcoal to the smelters of the region. The seed is used as food by the Indians who gather the cones and expel the seeds from them by heat; they are used fresh or roasted and stored for future use, and are also made into meal. It is also called Single-leaf pine, Pinon nut pine, Nevada nut pine, Gray pine, and Fremont's nut pine. 10. ROCKY MOUNTAIN NUT PINE — Pinus edulis Engehnann This is also called Pinon, Nut pine, Pinon pine, and New Mexican pinyon, and, like the other nut pines is a small tree of the drier mountain regions, at altitudes of 1800 to 2400 meters, forming forests with Juniper and one or more other pines in southwestern Wyoming, Colorado, eastern Utah, western Texas to Arizona, and adjacent Mexico. Its maximum height is 12 meters, with a trunk diameter of dm., but it is usually much smaller. The trunk is short, often di\'ided very nearly to the ground. The branches are horizontal at first, the tree becoming round topped. The bark is 12 to 18 mm. thick, irregularly fissured into connected ridges covered by close light brown or reddish yeUow scales. The twigs are stout and covered by the closely imbricated scales of the branch-buds, which
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