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Members of the Oregon, Illinois Woman's Council started the process by lobbying the Illinois legislature to set aside White Pines Woods as a state park. [3] In 1903 the Illinois legislature appropriated US$30,000 for the purchase of White Pines Woods, the southernmost stand of virgin, native white pine trees in the state.
Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.
Closed-cone forests rely on regular but infrequent fires, often stand-replacing crown fires. Fire opens up space in the canopy or clears away litter on the ground, so there is less competition for germinating seeds. Thus, the fire is an advantageous time for trees to drop their seeds.
Once the pine cones are collected, they're brought to a network of nurseries, where the seeds are extracted and grown into seedlings. One million seedlings will plant about 4,500 acres of new forest.
Mature Pinus pinea (stone pine); note umbrella-shaped canopy: Pollen cones of Pinus pinea (stone pine) A red pine (Pinus resinosa) with exposed roots: Young spring growth ("candles") on a loblolly pine: Monterey pine bark: Monterey pine cone on forest floor: Whitebark pine in the Sierra Nevada: Hartweg's pine forest in Mexico
The leaves snap cleanly when bent; this character, stated as diagnostic for red pine in some texts, is however shared by several other pine species. The cones are symmetrical ovoid , 4–6 cm ( 1 + 1 ⁄ 2 – 2 + 1 ⁄ 4 in) long by 2.5 cm (1 in) broad, and purple before maturity, ripening to nut-blue and opening to 4–5 cm ( 1 + 1 ⁄ 2 –2 ...
On the coast, the knobcone pine may hybridize with bishop pine (Pinus muricata), and Monterey pine (Pinus radiata). In the western foothills of the Sierra Nevada, knobcone pine is often a co-dominant with blue oak (Quercus douglasii). [7] The species is susceptible to fire, but this melts the cone resin, releasing seeds for regrowth. [4]
Often sold as living Christmas trees, Norfolk Island pines can last for years well beyond the holidays with the right care.