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Quercus ellipsoidalis, the northern pin oak or Hill's oak, is a North American species of oak tree native to the north-central United States and south-central Canada, primarily in the Great Lakes region and the Upper Mississippi Valley. [2] It most commonly occurs on dry, sandy soils. [3]
A pine is any conifer tree or shrub in the genus Pinus (/ ˈ p aɪ n ə s /) [2] of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae.. World Flora Online accepts 187 species names of pines as current, with additional synonyms, making it the largest family among the conifers. [3]
Pines with one fibrovascular bundle per leaf, (the former subgenera Strobus and Ducampopinus) were known as haploxylon pines, while pines with two fibrovascular bundles per leaf, (subgenus Pinus) were called diploxylon pines. Diploxylon pines tend to have harder timber and a larger amount of resin than the haploxylon pines.
Jack pine (Pinus banksiana) Lodgepole pine (Pinus contorta) Monterey pine (Pinus radiata) Ponderosa pine (Pinus ponderosa) Red pine (North America) (Pinus resinosa) Scots pine, red pine (UK) (Pinus sylvestris) White pine. Eastern white pine (Pinus strobus) Western white pine (Pinus monticola) Sugar pine (Pinus lambertiana) Southern yellow pine
The leaves are in fascicles of three, [6] needle-like, yellow-green, twisted, and 9–15 centimeters (3 + 1 ⁄ 2 –6 in) long. The cones are resin-sealed and irregularly shaped, [4] 8–16 cm (3 + 1 ⁄ 4 – 6 + 1 ⁄ 4 in) long and clustered in whorls of three to six on the branches. The scales end in a short stout prickle.
Quercus arkansana, the Arkansas oak, is a species of oak tree. It is native to the southeastern United States (eastern Texas, southern Arkansas, Louisiana, Mississippi, Alabama, Georgia, and the Florida Panhandle). [3] It is threatened by use of its habitat for pine plantations, clearing of land, and diebacks that may be caused by drought.
The Willamette Valley ponderosa variant only grows on the valley floor, unlike the Douglas-fir, which grows on hillsides, and the wood is softer and easier to mill than the native hardwoods. [1] Because of this, when early settlers used wood from the trees to build homes and cleared land for agriculture, the population was "decimated". [ 1 ]
Pinus albicaulis leaves are in fascicles (bundles) of five, and the cone is dark purple when immature (Mount Rainier National Park). Whitebark pine is a member of the white pine group, the Pinus subgenus Strobus, and the section Strobus; like all members of this group, the leaves (needles) are in fascicles (bundles) of five [5] with a deciduous sheath.