. Bulletin. Natural history; Natural history. 28 Illinois Nak kal Hlstuuv Si hvky PINUS BANKSIANA Lamiikkt Jack Pine Gray Pine The Jack Pine is a tree of varied hal)it. Usually it is small, 15 to 40 feet high, with an open, stimted, irregular crown, which begins nearly at the ground. Its stout, stiff leaves, between .)4 and 1^ inches long, grow- in bundles of 2 and generally are curved and twisted. The oblong stani- inate cones occur in large clusters at the base of the new growth. The smaller, globular ovulate cones stand in clusters of 2 to 4 on the sides of the shoots and, as they
. Bulletin. Natural history; Natural history. 28 Illinois Nak kal Hlstuuv Si hvky PINUS BANKSIANA Lamiikkt Jack Pine Gray Pine The Jack Pine is a tree of varied hal)it. Usually it is small, 15 to 40 feet high, with an open, stimted, irregular crown, which begins nearly at the ground. Its stout, stiff leaves, between .)4 and 1^ inches long, grow- in bundles of 2 and generally are curved and twisted. The oblong stani- inate cones occur in large clusters at the base of the new growth. The smaller, globular ovulate cones stand in clusters of 2 to 4 on the sides of the shoots and, as they grow, they be- come oblong-conical, IJ^ to 2 inches long, strongly curved, and turn to a light yellow. They remain closed for several years, but after they have shed their brownish-black, winged seeds, they cling to the tree for a decade or more. The trunks of fine trees may reach a height of 60 or TO feet and a diameter of 15 inches, or more; and the thin, red-tinted, dark-brown bark is divided irregularly into narrow, rounded, scaly ridges. Pistribulioii: The records that have been available show that the Jack Pine has been found in Lake. Cook, DuPage. and Ogle counties. The jM'esent range of the tree is to the north of Illinois, but it has been able Distribution of the Jack Pine, to survive in favorable situations in this State. Preferring sunlight for the germination of its seeds and for growth, the Jack Pine is to be found on poor, sandy soils and on burned-over barren land. Pepoon^ states that the tree still occurs near Lake Michigan on the W'aukegan sand moors. Uses: When growing in open stands on barren lands, the Jack Pine has the form of an orchard tree, with a short bole and an open, spreading crown. Its wood is then of little value; but in denser stands the trunk is. Fig. 3. 'Flora of the Chicago Region, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
