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Dacrycarpus dacrydioides, commonly known as kahikatea (from Māori) and white pine, is a coniferous tree endemic to New Zealand. A podocarp , it is New Zealand's tallest tree, gaining heights of 60 m over a life span of 600 years.
Kittredge and Gervorkiantz (1929) [133] determined that removal of the aspen forest floor increased germination percentage after the second season in seed spots of both white pine and white spruce, in four plots, from 2.5% to 5%, from 8% to 22%, from 1% to 9.5%, and from 0% to 15%.
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 ...
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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.
Pinus aristata has seeds that are gray-brown to nearly black in color with darker spots and 5–6 mm long. The seed has an attached papery wing 10–13 mm long. [5] [7] Their mean weight is 25 milligrams, significantly smaller than those of the whitebark pine at 175 mg, but much larger than the 4 mg of lodgepole pine. [10]
It is a measure of germination time course and is usually expressed as a percentage, e.g., an 85% germination rate indicates that about 85 out of 100 seeds will probably germinate under proper conditions over the germination period given. Seed germination rate is determined by the seed genetic composition, morphological features and ...
Pinus flexilis, the limber pine, is a species of pine tree in the family Pinaceae that occurs in the mountains of the Western United States, Mexico, and Canada. It is also called Rocky Mountain white pine. A limber pine in Eagle Cap Wilderness, Oregon, has been documented as over 2,000 years old, and another one was confirmed at 1,140 years old.