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  2. Pinus albicaulis - Wikipedia

    en.wikipedia.org/wiki/Pinus_albicaulis

    Pinus albicaulis is the only type of tree on the summit of Pywiack Dome in Yosemite National Park. Pinus albicaulis, known by the common names whitebark pine, white bark pine, white pine, pitch pine, scrub pine, and creeping pine, [4] is a conifer tree native to the mountains of the western United States and Canada, specifically subalpine areas of the Sierra Nevada, Cascade Range, Pacific ...

  3. Sierra Nevada subalpine zone - Wikipedia

    en.wikipedia.org/wiki/Sierra_Nevada_subalpine_zone

    The Sierra Nevada subalpine zone occurs between 2,450–3,660 metres (8,000–12,000 ft), and is characterized by an open woodland of several conifer species, including whitebark pine, lodgepole pine, western white pine, mountain hemlock, and Sierra juniper. The vegetation and ecology is determined by the harsh climate, with extensive snow and ...

  4. Silviculture - Wikipedia

    en.wikipedia.org/wiki/Silviculture

    For seeds of many species, light is also necessary, and facilitates the germination of seeds in other species, [7] but spruces are not exacting in their light requirements, and will germinate without light. White spruce seed germinated at 35 °F (1.7 °C) and 40 °F (4.4 °C) after continuous stratification for one year or longer and developed ...

  5. Closed-cone conifer forest - Wikipedia

    en.wikipedia.org/wiki/Closed-cone_conifer_forest

    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.

  6. Cronartium ribicola - Wikipedia

    en.wikipedia.org/wiki/Cronartium_ribicola

    Cronartium ribicola is native to China, and was introduced to North America. The rust was first discovered on currants in Geneva, New York in 1906. [3] It was first seen on White pine specifically on imported seedlings from European nurseries in 1909. [3]

  7. Western white pine - Wikipedia

    en.wikipedia.org/wiki/Western_white_pine

    The seeds are small, 4–7 mm (3 ⁄ 16 – 1 ⁄ 4 in) long, and have a long slender wing 15–22 mm (9 ⁄ 16 – 7 ⁄ 8 in) long. The branches are borne in regular whorls , [ 5 ] produced at the rate of one a year; this is pronounced in narrow, stand-grown trees, while open specimens may have a more rounded form with wide-reaching limbs.

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  9. Pinus monophylla - Wikipedia

    en.wikipedia.org/wiki/Pinus_monophylla

    Open cone with empty pine nuts. The seed cones open to 6–9 cm (2 + 1 ⁄ 4 – 3 + 1 ⁄ 2 in) broad when mature, holding the seeds on the scales after opening. The seeds are 11–16 mm (7 ⁄ 16 – 5 ⁄ 8 in) long, with a thin shell, a white endosperm, and a vestigial 1–2 mm (1 ⁄ 32 – 3 ⁄ 32 in) wing.

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